Waking up isn’t an event. It’s the end of a process that began the night before, and sleep is really just one stretch of a longer story that started the moment you woke up yesterday.

This post is the companion to Sleep 101, the second episode of the podcast. I walk through one full day, twenty four hours, morning to morning, following the biology the whole way. Every term is woven into the story as it happens. If you’re a note taker, I’ve built you a glossary at the end so you can save the definitions.

Here’s what I hope you get from it:

Clarity instead of complexity.

Rhythm instead of constant optimization.

Practical action instead of information overload.

Self responsibility instead of the need for perfection.

Human connection instead of impersonal interaction.

I’m your guide here. I’ve been there. I have great nights of sleep most of the time, and some nights I don’t. The difference is I know what I did the day before that affected it, so I can fix it quickly and get back to sleeping well. That’s what I want for you too.

6:30 a.m.: The Wake-Up

Before your alarm goes off, your core body temperature starts to climb and cortisol rises, even before you open your eyes. Cortisol isn’t the villain it’s made out to be. You need it, just in balance. It’s your get up signal.

About 30 to 60 minutes after waking, you get another surge of cortisol. That’s actually what most people are chasing when they reach for coffee or an energy drink. The surge already happened. They’re just trying to recreate what their body already gave them.

So who told your body to wake up? You have a master clock called the suprachiasmatic nucleus, or the SCN, a tiny cluster of cells deep in the brain. It keeps time for your temperature, your hormones, your hunger, your energy, and your mood. It sets your circadian rhythm.

Isolated from all time cues, that clock actually runs a little over 24 hours. Which means it has to be reset every single day. The cue that resets it is sunrise.

Sunrise: Resetting the Clock

At the back of your eyes, separate from the cells that build the pictures you see, there’s a second set of cells that measure brightness. They contain a pigment called melanopsin, and they send the SCN a simple message: it’s daytime.

That’s what I mean when I say light carries data. Morning light anchors the timing of everything that happens for the rest of the day, including how well you sleep that same night. It anchors your temperature, your hormones, your hunger, your energy, and your mood, the exact list that shows up as perimenopausal symptoms when it’s off.

You don’t need long. Five to ten minutes outside, no sunglasses, no contacts if you can manage it, is enough. My own life hack is driving with my windows down, which drives my family absolutely bananas, but I want the light. Consistency will always beat perfection, so find a version that fits your actual routine.

Midday: The Debt You’re Building

From the moment you wake up, your brain makes a chemical called adenosine, a byproduct of being awake. The more it builds, the more you want to sleep. This mechanism was first observed in animal studies and is now well established in humans. There are two forces working on you at once: your clock’s alerting signal, and sleep pressure building all day. Sleep scientists call this the two process model.

Caffeine doesn’t actually give you energy. It blocks the docking spots adenosine wants to attach to. Think of it like circling a packed parking lot. Adenosine is still trying to park, caffeine is just sitting in every spot, so it keeps building up outside, waiting.

Caffeine’s half life is roughly three to six hours, and that varies a lot person to person. So that 2 or 3 p.m. coffee is very likely still blocking those spots by the time you go to bed.

The 3 p.m. slump is real. Sleep pressure is climbing, and there’s also a natural early afternoon dip in alertness. Neither one is something you did wrong. It’s just timing. The problem comes when you block those receptors with more caffeine instead of letting sleepiness build naturally. Eventually all that backed up adenosine floods in at once, and you feel wiped out, so you reach for more caffeine to compensate.

Evening: The Light Goes Down

As the sun sets and light fades, the SCN signals your pineal gland to start releasing melatonin. Melatonin isn’t a sedative the way most people think of it. It’s a timing signal. It tells your body it’s biological night.

Your SCN can’t tell the difference between the sun and the light you just turned on in the kitchen. It only registers light and dark. Turning on a bright light before bed sends your brain the opposite signal from the one you want, and it can delay melatonin onset and shorten how long it lasts.

I used to be the kid who slept with the lights on and thought it was a superpower. I was actually confusing my biology every single night, and it only got worse once I started working night shift.

The fix is to match what’s happening outside. If it’s dark out, keep it dim inside, or lit by something low like a candle. The goal is intentional, not perfect. I still turn lights on at night. I still sit under bright stadium lights at my son’s football games, because he’s my son and I only get a few more years of that. Aim for roughly 80 percent of the time, not all of it.

Bedtime and Sleep Latency

You get into bed and turn out the light. Somewhere between that moment and actually falling asleep is a stretch of time called sleep latency.

This is why advice like “get eight hours of sleep” is incomplete. It rarely accounts for sleep latency, which can take anywhere from 10 to 30 minutes. If you’re in bed from midnight to 6 a.m., you’re not actually getting six hours of sleep. You’re closer to five and a half. If you want a true eight hours, plan for eight hours and thirty minutes in bed.

The National Sleep Foundation marks falling asleep within 30 minutes or less as a sign of good sleep quality, and consistently taking 45 minutes or more as a sign of poor sleep. If it’s taking you longer right now, that’s okay. That’s exactly what the rest of this podcast is for.

On the other end, falling asleep in five minutes flat isn’t a badge of honor either. The Sleep Foundation considers that a sign of sleep debt, meaning you’re overtired. You want to land somewhere in the 10 to 30 minute range. Not too fast, not too slow, like Goldilocks.

Sleep latency doesn’t get talked about much, but it’s where the entire day shows up. Evening light that pushed your melatonin later. A late nap or a day with no daylight that left your sleep pressure too low. A warm room or a racing mind keeping your core temperature from dropping.

To fall asleep and stay asleep, your core temperature needs to drop by about 2 to 3 degrees Fahrenheit. One simple hack: take a warm shower about two hours before bed. It gives your body time to bring that temperature back down afterward, which helps you fall asleep faster.

Sleep aids can help you fall asleep too, but more often than not, they sedate you rather than let your brain move through the sleep cycles it actually needs.

The Night: Sleep Cycles

Once you’re asleep, you’ll move through roughly four to five sleep cycles, each about 90 minutes long.

Light sleep has two stages. Stage two includes sleep spindles, brief bursts of brain activity tied to moving what you learned that day into long term memory. In light sleep, your heart rate and temperature are falling.

Deep sleep, also called slow wave sleep, is where the heavy lifting happens. This is when you get your biggest pulse of growth hormone, involved in tissue repair. Blood pressure dips. The brain runs its clearing process, flushing out waste like amyloid plaques.

This is exactly why the type of sleep matters, not just the hours. If you fall asleep with the help of medication, your brain doesn’t move through these same restorative stages. It’s sedated, not sleeping. Sleep researchers studying people on sleep medication see it clearly on brain scans: different cycles, fewer sleep spindles, less slow wave sleep, altered REM. If you’ve optimized everything free, light, temperature, timing, and you’re still struggling, that’s the point to bring it to your provider.

Deep sleep is front loaded into the earlier part of the night. If you want more of it, go to bed earlier. You can’t stay up late and expect to make it up later in the night.

REM sleep, rapid eye movement, takes over more in the second half of the night. That’s when vivid dreaming and emotional and memory processing happen, and your muscles are temporarily paralyzed so you don’t act out your dreams. Deep sleep comes first. Dreaming finishes the night.

Notice that emotional stability and memory are exactly what tends to slip in perimenopause: brain fog, feeling more on edge than usual. That’s not a coincidence. It’s the second half of sleep, the REM half, where things often start to fall apart.

3 a.m.: The Midlife Twist

For a lot of perimenopausal and menopausal women, the night starts out fine and then falls apart. In the second half of the night, sleep gets lighter, your temperature starts to rise, and cortisol begins climbing. That’s the window where you wake up with a racing heart, sometimes soaked, wired and tired at the same time.

Sleep complaints rise across the menopausal transition, and it’s not just about age. As estrogen falls, your thermoneutral zone, the narrow range your body considers comfortable, narrows too. A small rise in core temperature that you wouldn’t have noticed at 30 is now enough to trigger a hot flash.

This is not a personal failure. I want to say that twice, because most of us internalize it as one. We ask, why can’t I sleep anymore? The more useful question is, what changed, and which levers are still in my control?

Back to 6:30 a.m.

And here we are again. Temperature rises, cortisol climbs, light sleep sets in, and the cycle closes so it can open again. One clock. Two forces. A signal called light. A cool down. A few cycles. Right back to the beginning.

Notice how much of this story is about light, temperature, rhythm, and timing, and how little of it is about willpower. None of it was about pushing through on more caffeine.

When you get this right, the payoff compounds. Better sleep means you remember things again, you have the energy for a walk or for your kids or grandkids, and you’re not as edgy. I’ll raise my hand on that one. When I don’t sleep well, I’m not a nice person to be around, and my family will back me up. That’s part of why I had to leave night shift behind. It all comes back to sunrise, and resetting that suprachiasmatic nucleus, every single morning.

Keep Going With Me

If you haven’t subscribed to The Sleep Nurse on Substack yet, I’d love to have you. You can find it at midlifesleeprn.com.

Free subscribers now get a 7 day sleep reset, a short walk through the principles that matter most for resetting your clock. Seven days isn’t enough to fully reset a rhythm, but you should notice a difference. I’ve also included two bonus pages from the full e-book: a 24 hour clock showing when different body functions happen, a nice companion to this episode, and a wake up calculator that does the sleep latency math for you across 7, 8, and 9 hour targets.

Annual subscribers get all of that plus the full 37 page e-book, A Sleep Nurse’s Guide to Sleep.

Thank you for listening and for reading. Align your day. Restore your night.

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This post is an educational, general audience summary of sleep science. It isn’t a substitute for individualized medical advice. Talk with your healthcare provider before changing any medication.

Glossary

• Adenosine: A chemical that builds up in your brain the longer you’re awake. It’s what creates the drive to sleep, known as sleep pressure.

• Circadian rhythm: Your body’s roughly 24 hour internal cycle, controlling temperature, hormones, hunger, energy, and mood.

• Clock chaos: What happens when your body isn’t getting a clear light and dark signal, so your internal clock can’t tell what time it actually is.

• Cortisol awakening response: The natural surge of cortisol that happens in the first 30 to 60 minutes after waking, which helps you feel alert.

• Deep sleep (slow wave sleep): The most physically restorative stage of sleep, when growth hormone is released, blood pressure dips, and the brain clears waste.

• Melanopsin: A light sensing pigment in a special set of cells at the back of your eyes. It tells your brain’s master clock whether it’s day or night.

• Melatonin: A hormone released by the pineal gland that signals biological night. It’s a timing cue, not a sedative.

• REM sleep (rapid eye movement): The sleep stage, concentrated in the second half of the night, associated with vivid dreaming and emotional and memory processing.

• Sleep latency: The amount of time between turning out the lights and actually falling asleep.

• Sleep pressure: The growing urge to sleep that builds throughout the day as adenosine accumulates.

• Sleep spindles: Short bursts of brain activity during stage two light sleep, involved in moving the day’s learning into long term memory.

• Suprachiasmatic nucleus (SCN): The body’s master clock, a tiny cluster of cells deep in the brain that keeps time for temperature, hormones, hunger, energy, and mood.

• Thermoneutral zone: The narrow temperature range your body considers comfortable. It narrows as estrogen declines, making hot flashes more likely.

• Two process model: The sleep science model describing how your circadian clock’s alerting signal and your building sleep pressure work together to determine sleepiness.

References

1. Baker, F. C., et al. “Sleep problems during the menopausal transition: prevalence, impact, and management challenges.” Nature and Science of Sleep, 2018; 10:73-95.

2. Borbély, A. A. “A two process model of sleep regulation.” Human Neurobiology, 1982; 1(3):195-204.

3. Clow, A., et al. “The cortisol awakening response: more than a measure of HPA axis function.” Neuroscience & Biobehavioral Reviews, 2010; 35(1):97-103.

4. Czeisler, C. A., et al. “Stability, precision, and near 24 hour period of the human circadian pacemaker.” Science, 1999; 284(5423):2177-2181.

5. Dement, W. C., & Vaughan, C. The Promise of Sleep. Delacorte Press, 1999.

6. Fredholm, B. B., et al. “Actions of caffeine in the brain with special reference to factors that contribute to its widespread use.” Pharmacological Reviews, 1999; 51(1):83-133.

7. Freedman, R. R. “Menopausal hot flashes: mechanisms, endocrinology, treatment.” Journal of Steroid Biochemistry and Molecular Biology, 2014; 142:115-120.

8. Gooley, J. J., et al. “Exposure to room light before bedtime suppresses melatonin onset and shortens melatonin duration in humans.” Journal of Clinical Endocrinology & Metabolism, 2011; 96(3):E463-E472.

9. Hattar, S., et al. “Melanopsin containing retinal ganglion cells: architecture, projections, and intrinsic photosensitivity.” Science, 2002; 295(5557):1065-1070.

10. Kräuchi, K., et al. “Warm feet promote the rapid onset of sleep.” Nature, 1999; 401(6748):36-37.

11. Ohayon, M., et al. “National Sleep Foundation’s sleep quality recommendations: first report.” Sleep Health, 2017; 3(1):6-19.

12. Porkka-Heiskanen, T., et al. “Adenosine: a mediator of the sleep inducing effects of prolonged wakefulness.” Science, 1997; 276(5316):1265-1268.

13. Takahashi, Y., et al. “Growth hormone secretion during sleep.” Journal of Clinical Investigation, 1968; 47(9):2079-2090.

14. Walker, M. Why We Sleep. Scribner, 2017.

15. Xie, L., et al. “Sleep drives metabolite clearance from the adult brain.” Science, 2013; 342(6156):373-377.

And the first thing that happens, the first act of creation in one of the oldest books in the world, is light.

“Let there be light.”

Not the sun. Not the stars. Those don’t arrive until the fourth day. Light comes first, on its own, before anything we would think of as a source of it.

Genesis isn’t the only place this shows up. The Quran calls God the light of the heavens and the earth. Hindu scriptures speak of a light of lights. Sikh teaching describes a divine light that is present in all of creation.

Different cultures. Different centuries. Different languages. Light at the center of all of them.

I was pondering this one day in the shower, and that is how this episode came about.

I have spent more than thirty years in exam rooms, labor rooms, operating rooms, and at bedsides. When a woman says, “I can’t sleep,” I know how that conversation usually goes. It rarely starts with light.

Genesis started with light. Medicine starts with pills.

This week I want to talk about that gap, and about what we might be missing on the other side of it.

Why I care about this

I’m Seanna Aker. I’m a registered nurse, a mom of three, and the founder of The Sleep Nurse, where I teach midlife women how to sleep again. Sleep is my life’s work.

For almost twenty of my thirty-plus years as a nurse, I worked night shift, and my own sleep fell apart. I was a night shift nurse and a mom, trying to balance everything. I couldn’t nap before a shift because there was dinner to make and everything else to do. My husband was in grad school at the time. By the time I drove home the next morning, around eight or eight-thirty, I had often been awake close to twenty-four hours. I did this week after week, year after year.

So I leaned heavily on medication. I took Ambien. I took melatonin. I took Benadryl. They helped, but later I realized they were only sedating me. I wasn’t getting restorative sleep. It took about four years for the fog to lift, and even then I was not sleeping well. I still relied on supplements and outside sources to get to sleep.

What changed for me wasn’t a new pill. It was learning how light, routine, and rhythm shape my biology. It sounds simple, and it is not something they taught us in nursing school. We were taught about pills. You have pain, what’s your pain score, here’s a pill. You can’t sleep, here’s a pill. We learned biology, but we did not learn about circadian rhythms.

It sounds a little woo, but we are biological beings, just like plants and animals. When I learned how sunlight outdoors helps regulate my biology, and I started practicing it, that is when my sleep changed.

This show is for midlife women whose sleep has quietly fallen apart. If you wake at three in the morning, or you feel wired and tired, you are in the right place. I’m not saying you should never take a supplement or a pill if it works for you. I want you to work on the foundation, so whatever you add works better.

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Ancient rhythms, modern mechanism

I want to be careful about something, because I care more about being accurate than being dramatic.

The people who built these traditions were not writing sleep advice. They were expressing devotion, meaning, and gratitude. I have no way to verify whether they understood circadian biology, and saying so would be an overreach. You deserve better than that.

What I will say is this. Many of the rhythms these traditions built into daily and yearly life happen to line up with what circadian science now tells us matters.

Ancient rhythms. Modern mechanism. I think that’s worth noticing.

Dawn, midday, and dusk

Look at the shape of a day in many traditions. In Islam, the first prayer of the day, Fajr, is at dawn. In Hindu practice, the daily devotions called sandhya are traditionally tied to dawn, midday, and dusk. In Judaism, Shabbat begins with candles lit shortly before sunset. In many Christian traditions, evening prayer, vespers, marks the day turning toward night.

Dawn. Midday. Dusk. The hours when light is changing the most are the hours many religions built their core practices around.

Whether or not you share any of these faiths, notice what the rhythm asks of the body. Be up as the light comes up. Pause as it fades. Bring in a candle or a lamp as the day closes.

That is, more or less, a morning light routine and an evening wind-down, built into the calendar long before anyone had a name for melatonin.

It isn’t only the day. It’s the year.

Think about how many celebrations sit near the sun’s turning points. The winter solstice, the shortest day of the year, shows up in Dongzhi in China, in Yalda, the longest night, in Iran, and in Yule in Northern Europe. The Inca held Inti Raymi, a festival of the sun, around their winter solstice. The spring equinox is Nowruz, the Persian new year. Midsummer brings bonfires and festivals across Northern Europe.

Some of the oldest structures we have were built around the sun. At Newgrange in Ireland, a passage tomb older than the pyramids, a beam of light reaches the inner chamber at sunrise around the winter solstice. Stonehenge is aligned to the midsummer sunrise and the midwinter sunset.

Not every holiday was created for the solstice, and scholars debate the origins of some of them. These are celebrations from all over the world and across history. But it is fair to say that many cluster around the sun’s turning points. People have been marking the changing light for a very long time.

Your eyes: the master clock

Now the biology. You don’t become a nurse if you don’t like biology. It was one of my favorite subjects, so I am going to take my time with it.

Most of us learned that the eye is for seeing. Rods and cones give you sight, color, and detail. That is true. But around the turn of this century, researchers described something that changed how we understand light. There is another kind of light-sensing cell in the retina, and it isn’t there to help you see a picture at all.

These cells contain a pigment called melanopsin. Their job is to measure how much light is in your environment, and they respond most strongly to the bright, blue-rich light of a daytime sky. (If you are a paid subscriber, the ebook includes a diagram of these cells and their full name.)

They send that information to a tiny area deep in the brain called the suprachiasmatic nucleus, or the SCN. This is your master clock.

The SCN doesn’t only keep time. It conducts. Think of an orchestra. Your liver, your gut, your muscles, and your skin all have their own clocks. In fact, most cells in your body have one. The SCN is the conductor that keeps them playing together. It tells your body when to feel alert, when your temperature should drop, and when to release melatonin and cortisol.

Here is what makes light so important. Left on its own, the human clock doesn’t run exactly twenty-four hours. For most people it runs slightly longer. Light is the daily reset. It’s how the conductor stays in time with the sun.

That is why morning light is the anchor. It tells the clock when your day began, and that helps determine when your night begins.

Your body also seems to keep track of how long the night is. In one classic lab study, when people were given longer nights, their bodies released melatonin for a longer stretch. Studies of real-world seasons are less consistent, and modern indoor lighting probably blurs the signal. Look at how many people struggle with sleep today.

But here is the bigger idea. Your body is always collecting data and information from the light around it, whether it’s natural or artificial.

Your skin: light sensors too

Your eyes are not the only place your body collects light signals.

Researchers have found light-sensitive proteins called opsins in human skin cells. Melanopsin has been reported there too, in at least one study, though another study did not detect it. So that part of the science is still being worked out.

I want to be clear about this word, because I know how it sounds. It is melanopsin, not melanoma. Melanoma is skin cancer. Melanopsin is a light-sensing pigment. They sound alike because they share the Greek word for dark. Melanopsin got its name because it was first discovered in the pigment cells of frog skin.

Your skin is more than a covering. It responds to light. The best-known example is vitamin D, which your skin makes when it is exposed to UVB light from the sun. Skin cells also have their own internal clocks, and researchers are studying how light influences them.

What those light-sensitive proteins in your skin actually do, and whether they influence your master clock, is still being worked out. The pathway we understand best, the one that sets your master clock, runs through the eyes. So I am not telling you your skin sets your circadian rhythm.

What I will say is that your body collects information from light through more than one route. When you step outside without sunglasses, with your eyes open and some skin exposed, you give it the fullest signal.

Because I’m a nurse, I have to say this too: practice safe sun. There are apps that help you measure your sun exposure and tell you when to go inside. There are natural sunscreens. If you use a traditional sunscreen, follow what you and your doctor have decided, or what you feel is best for you and your family.

Cortisol and melatonin: the dance

Now the part I’m excited about. It seems like you can’t open Instagram or Facebook without someone talking about cortisol and how to lower it. What nobody talks about is the relationship between cortisol and melatonin.

When we think of cortisol, we think of fight or flight. It’s our stress hormone, the one that helps us get away from the tiger. But cortisol also wakes us up in the morning. It’s our body’s way of saying it’s time to get going. Cortisol rises, blood pressure rises, and everything comes back on board.

Cortisol and melatonin have a rhythm, a kind of dance. Cortisol is higher in the morning, which is what wakes us up, and lower in the evening, when melatonin comes on board. Melatonin is our darkness hormone. It’s made when it gets dark.

But we live in a world where the daytime never ends. Bright, blue LED light at night suppresses melatonin, and cortisol gets out of balance.

I want to say something about melatonin, because it matters. Melatonin is not a sedative. It is a timing signal. It tells your body it’s biological night. That is very different from a medication that makes you sleepy. You’ve heard my story, so you know I’ve taken my share of melatonin.

When you allow darkness into your evening, by turning lights off, wearing blue-blocking glasses, lighting a candle instead of flipping a switch, or swapping your light bulbs, you are helping your body make its own melatonin. That’s why light is such a powerful lever when it comes to sleep.

What modern life did to the signal

When the signal is out of balance, there are usually two parts to it. The first is being inside during the day.

Typical indoor light measures in the hundreds of lux. An overcast day outside can be in the thousands. I have a lux meter on my phone. On a bright, sunny day I measured about thirty-five thousand. Back inside, I get five or six hundred. Most of us stay inside, so we get a blended, muddy signal when we should be getting that strong outdoor one.

The second part is the evening. We come home, get supper on, brush our teeth, and switch on every light. I keep candles in my bathroom. If I take a shower at night, I light a candle. If I’m brushing my teeth, I light a candle. Most people turn on the bathroom light and don’t wear blue-blocking glasses, and the instant you do that, you tell your body it is noon. Those light-sensing cells respond to blue light, and modern LED bulbs emit plenty of it. So your brain stops making melatonin and calls for more cortisol so you can face the day.

Then, because you didn’t make that melatonin, you feel groggy and slow in the morning, and wired and tired at night. The cycle continues because cortisol and melatonin are out of sync.

I want to add a caveat so you get the full picture. Cortisol is influenced by more than light. Stress, food, medication, and hormonal changes all affect it. But light is one of the most important levers, and it is one that not many of us are pulling. We look for a supplement, or a lot of other things, to manage cortisol, without trying to rebalance the cortisol and melatonin cycle that runs on a twenty-four-hour clock.

This is my opinion, but I have often wondered: do we really have a cortisol problem in this world, or do we have a lack-of-melatonin problem?

It isn’t only sleep

Cortisol and melatonin are not the only hormones on this schedule. Many hormones follow a daily rhythm that the master clock helps set. So when you go outside in the morning and get sunrise in your eyes, you reset the clock, and your body has a better idea of when to release the hormones it needs for the day.

Growth hormone, which supports repair and recovery, is released mostly during sleep. Deep sleep happens mostly in the first part of the night. Thyroid-stimulating hormone follows the master clock. So do leptin and ghrelin, the hormones tied to fullness and hunger.

When the clock signal is muddy, because we live indoors and then turn the lights on at night, I call it clock chaos. Think about jet lag. You cross time zones, and you are supposed to function on local time while your body is still on home time. That messes with you a little, or a lot. Now imagine it happening day after day, year after year, because we aren’t giving our body the right signals through light. That is what a lot of women are struggling with, and they don’t even know it.

Estrogen and progesterone are different. They run on a monthly rhythm, not a daily one, and light is not a substitute for what is changing there. But the daily rhythms around them are ones you can influence.

The same clock also influences how alert you feel during the day and how you feel in general. Light therapy is a recognized treatment for seasonal depression, which tells us how powerfully light can affect mood. For many women in midlife, energy and mood can already feel harder to manage. I’m not saying light fixes everything. But a good night of sleep really helps, and light is one of the levers that is usually missing from the conversation.

Everyone says, “Go outside and get morning light.” Nobody tells you why. It’s like telling your kid to do something. What’s the first thing they say? Why? I hope you are getting the why from this: light sets your clock, and your clock helps regulate what goes on in your body. When those things are working, we feel better, we sleep at night, and our bodies can repair.

Sleep matters for the brain too. In a small NIH study of twenty healthy adults, one night without sleep raised levels of beta-amyloid, a protein linked to Alzheimer’s disease, by about five percent in certain brain regions. The researchers were clear that this does not mean one bad night causes Alzheimer’s. But it fits the idea that sleep helps the brain clear waste products, and a lot goes on at night when we keep our twenty-four-hour clock in sync.

If you would like more on how sleep affects your hormones, I wrote about it in [link to “How Sleep Keeps You Young”].

Why light matters even more in midlife

I built The Sleep Nurse for midlife women because I am one. I am about to turn fifty-four, and I understand the struggle. I am grateful I discovered light five years ago, because it changed my life.

Yes, our bodies are changing. But here is the one thing I want you to understand: you have control over your light environment. You can go outside in the morning and get light in your eyes to reset your clock. You can decide which lights are on or off at night. You can decide whether to scroll on a phone that beams blue light at your eyes, whether to watch TV late, and whether to practice a wind-down routine.

These things are simple, and the simplest things are sometimes the hardest to put into practice. We are also told what to do without being told why. I believe that when we understand our bodies and trust our intuition, we have the power to change. That is what I want to do here: empower you.

Light and your blood sugar

Life is busy. You get home from kids’ sports and you are lucky to eat. Sometimes we eat late, or go out with friends. My best night is at home with my family, a book or a show, and an early bedtime, but I eat late sometimes too. We are told not to eat close to bedtime, and nobody explains why.

Here is something to pique your curiosity. Our bodies are less glucose tolerant at night than during the day, so the same meal eaten at night produces a different insulin and glucose response than the same meal earlier in the day.

In one small study, seventeen healthy adults ate the same standard evening meal on two occasions, once in dim light and once in bright light. The only difference was the light. After the bright-light meal, their glucose and insulin were higher, and their melatonin was lower.

In another small study, one night of sleeping with moderate room light on raised heart rate during sleep and left people more insulin resistant the next morning.

These were small studies in healthy adults, so I don’t want to overstate them. I have also seen people wearing continuous glucose monitors report changes in their blood sugar at night from blue light, apart from food or exercise. That is anecdotal. Maybe I’ll wear a monitor myself and let you know how it goes. Either way, it tells me light shapes how our bodies handle sugar, and it is something to think about.

The gap

Back to the gap I mentioned at the beginning. Most of our medical practice leaves out a huge piece of biology, and it is one that is in your control.

I have been that woman at the doctor who can’t sleep. What advice was I given? I wasn’t given advice. I was given a prescription for Ambien. In fact, I went in asking for it, because I desperately needed sleep so I could take care of people in the middle of the night. I still did not feel rested.

If you go to a functional medicine practitioner, they will often lead with supplements: melatonin, vitamins, and minerals to support your body and help bring down your cortisol. Those aren’t bad. But nobody talks about your light routine. Simple changes in your daily habits can help your body make its own melatonin, and you may not need a supplement. I have always believed that intrinsic melatonin trumps a pill any day. I have experienced that in my own life.

As a nurse, I am often the first person a patient talks to, and we do a nursing assessment. I have asked people about some of the most private parts of their lives. But I have never once asked, “How is your light environment? Did you get outside and see sunrise today? Are you spending too much time in artificial light?” Those were never part of any assessment I was taught.

The great thing about light is that it is free and low risk, and it works upstream of almost everything else, because it sets the clock that sleep depends on.

Genesis started with light. I think there is something to that. Not because it is ancient, but because when you begin with the signal that sets the clock, everything downstream has a better chance.

Try this tomorrow

• Morning: get outside within the first hour after you wake, for a few minutes, without sunglasses if you can. Never look directly at the sun.

• Midday: get some daylight, even for a few minutes.

• Evening: when the sun goes down, let your home follow it. Dim the lights, and use lamps, candles, or warm bulbs.

If that feels like a lot, start with the first one and see how it feels. If you have an eye concern, or take a medication that makes you sensitive to light, check with your provider first.

Waiting right outside your front door

Long before we had a name for melatonin, people organized their days and their years around light. We can do that too. There is nothing to buy and nothing to prescribe. It is waiting for you every morning, right outside your front door.

Thank you for spending some time with me. This is the first of many episodes of The Sleep Nurse. If you found it helpful, I hope you will follow the show and subscribe to my Substack, and come along on this journey into better health. I truly believe sleep is the foundation of our health, and it begins at sunrise.

Each week I am going deeper into my five sleep macros. This episode combined the first two. I will keep going into why we need light and why we need sleep, and why it is worth adjusting our daily routines to support that internal master clock. When that clock is in sync, it supports our hormones, helps bring cortisol and melatonin back into balance, and we tend to feel happier, have more energy, feel more rested, and have more patience with our families.

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Align your day. Restore your night.

This post reflects an educational, general-audience summary of sleep science. It is not a substitute for individualized medical advice.

References

1. Albreiki, M. S., Middleton, B., & Hampton, S. M. “A single night light exposure acutely alters hormonal and metabolic responses in healthy participants.” Endocrine Connections, 2017;6(2):100-110. doi:10.1530/EC-16-0097

2. Berson, D. M., Dunn, F. A., & Takao, M. “Phototransduction by retinal ganglion cells that set the circadian clock.” Science, 2002;295(5557):1070-1073. doi:10.1126/science.1067262

3. Blume, C., Garbazza, C., & Spitschan, M. “Effects of light on human circadian rhythms, sleep and mood.” Somnologie, 2019;23(3):147-156. doi:10.1007/s11818-019-00215-x

4. Czeisler, C. A., Duffy, J. F., Shanahan, T. L., et al. “Stability, precision, and near-24-hour period of the human circadian pacemaker.” Science, 1999;284(5423):2177-2181. doi:10.1126/science.284.5423.2177

5. Gooley, J. J., Chamberlain, K., Smith, K. A., et al. “Exposure to room light before bedtime suppresses melatonin onset and shortens melatonin duration in humans.” Journal of Clinical Endocrinology & Metabolism, 2011;96(3):E463-E472. doi:10.1210/jc.2010-2098

6. Haltaufderhyde, K., et al. “Opsin expression in human epidermal skin.” Photochemistry and Photobiology, 2015. PMID: 25267311

7. Hattar, S., Liao, H.-W., Takao, M., Berson, D. M., & Yau, K.-W. “Melanopsin-containing retinal ganglion cells: architecture, projections, and intrinsic photosensitivity.” Science, 2002;295(5557):1065-1070. doi:10.1126/science.1069609

8. Kusumoto, J., et al. “OPN4 belongs to the photosensitive system of the human skin.” Genes to Cells, 2020. doi:10.1111/gtc.12751

9. Mason, I. C., Grimaldi, D., Reid, K. J., et al. “Light exposure during sleep impairs cardiometabolic function.” Proceedings of the National Academy of Sciences, 2022;119(12):e2113290119. doi:10.1073/pnas.2113290119

10. Morris, C. J., Yang, J. N., Garcia, J. I., et al. “Endogenous circadian system and circadian misalignment impact glucose tolerance via separate mechanisms in humans.” Proceedings of the National Academy of Sciences, 2015;112(17):E2225-E2234. doi:10.1073/pnas.1418955112

11. Provencio, I., Jiang, G., De Grip, W. J., Hayes, W. P., & Rollag, M. D. “Melanopsin: An opsin in melanophores, brain, and eye.” Proceedings of the National Academy of Sciences, 1998;95(1):340-345. doi:10.1073/pnas.95.1.340

12. Sandu, C., Dumas, M., Malan, A., et al. “Human skin keratinocytes, melanocytes, and fibroblasts contain distinct circadian clock machineries.” Cellular and Molecular Life Sciences, 2012;69(19):3329-3339. doi:10.1007/s00018-012-1026-1

13. Shokri-Kojori, E., Wang, G.-J., Wiers, C. E., et al. “Beta-amyloid accumulation in the human brain after one night of sleep deprivation.” Proceedings of the National Academy of Sciences, 2018;115(17):4483-4488.

14. Wehr, T. A. “The durations of human melatonin secretion and sleep respond to changes in daylength (photoperiod).” Journal of Clinical Endocrinology & Metabolism, 1991;73(6):1276-1280. doi:10.1210/jcem-73-6-1276

If you’ve been waking up at three in the morning, heart racing, mind racing, wondering what’s wrong with me — then the TikTok doom scroll starts, and before you know it another night of 4-5 hours of sleep is in the books — I want you to hear and internalize this: nothing is wrong with you. 56% of perimenopausal women sleep less than seven hours on a typical night, the highest percentage of any menopausal group. Clinically significant insomnia roughly doubles during the menopause transition. 69% of midlife women report some form of sleep disturbance.

I know — “so you’re telling me this is going to go from bad to worse!” Maybe. But I want you to remember that YOU ARE NOT A STATISTIC. You have the power and the ability to equip yourself with the knowledge and tools to rise above this brief time in life. This is not a personal failing. It’s close to the norm, and it follows the menopause transition closely enough that national data shows the pattern. We are now prime targets for the sleep industry and every other industry that thinks it can capitalize on us. But seriously, who wouldn’t pay to have better sleep? A $65 billion industry is selling us pills and gadgets “hoping” to help. I’ve fallen prey to some of this marketing more than once. The problem is most medications sedate you. Sedation is not the same as restorative sleep.

This distinction is exactly where I start in my 37-page Sleep Guide I’ve been working on for months and finally finished: Align Your Day, Restore Your Night — A Sleep Nurse’s Guide to Circadian Health. It’s ready to be sent out to my annual subscribers. Thank you for your support and for trusting me as your sleep health guide.

If you’ve read Macros for Midlife Sleep here, the goal was to make you familiar with some of the key components in this guide — most importantly, shedding light on the question “why aren’t the things I’m currently doing working?” This guide is the foundation of the sleep macros and my proprietary sleep coaching program. Out of respect for my annual paid subscribers, I’m only going to give a broad overview here. But I want you to feel the passion I have to help midlife women obtain meaningful, restorative sleep. Let’s jump into it.

What question should I be asking?

Most women wonder “why can’t I sleep anymore.” I reframe this question in Part One:

“It’s not ‘why can’t I sleep anymore,’ it’s ‘what changed in my body’s signaling, and what levers are in my control that will cause meaningful change.’”

In the guide, I give you the knowledge and tools to pull those levers.

One night. Seventy percent.

As a nurse, this is the stat that stops me every time I re-read it: researchers restricted healthy adults to just 4 hours of sleep for a single night. The result? Natural killer (NK) cell activity — a key part of how your immune system protects you from viruses, disease, and more — dropped by roughly 70%. One night. That’s how fast your body’s defenses are damaged by a poor night of sleep.

I unpack the mechanism behind this in Part Two, along with something I call “clock chaos” — what happens when your master clock stops receiving a clear signal, and how that translates to waking at 3am and that afternoon energy slump.

Where it started for me

I was the kid who was afraid of the dark and slept with the light on. Then I became a nurse and worked night shift for years — almost two decades — which amplified everything. I leaned on medication just to get any rest at all. What I didn’t understand then was that sedated sleep and restorative sleep are not the same thing. I share my story in the guide, because I want you to know the fixes here didn’t come from a textbook first. They came from me studying and researching what the nursing textbooks left out.

What’s inside

Part One: The Truth About Sleep — Understanding sleep in midlife, and finding strength in the fact that you are not alone in this. Self-reflection to understand your sleep biases and current sleep patterns.

Part Two: Understanding Your Circadian Rhythm — Here we dive into some science. It’s okay, I’m your guide and partner in this — I make it simple to understand. You’ll learn about your master clock (SCN), the biology of light, and how all of this changes in midlife.

Part Three: Putting It Into Practice — Here I share the real-life application, starting with the Wake-Up Sleep Calculator and a 7-Day Sleep Check List, so you can start applying what you’ve learned on your terms.

If you’re an annual member

It’s already waiting for you! Read it slowly, in whatever order pulls you first.

If you’re not yet

This is exactly the kind of content I create for annual members: the deeper “why,” not just another quick list of tips. Upgrade to annual and it’s yours today, along with the rest of the members’ archive as it grows.

If you’re just finding your way to The Sleep Nurse — subscribe free to keep getting posts like Macros for Midlife Sleep. I’ll always teach the foundations there. This guide is simply where I go deeper.

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Align your day. Restore your night.

This post reflects an educational, general-audience summary of sleep science. It is not a substitute for individualized medical advice.

References

1. Vahratian, Anjel. “Sleep Duration and Quality Among Women Aged 40–59, by Menopausal Status.” NCHS Data Brief No. 286, National Center for Health Statistics, Sept. 2017. https://www.cdc.gov/nchs/products/databriefs/db286.htm

2. “Sleep Disturbance Associated with the Menopause.” Menopause, 2024. https://journals.lww.com/menopausejournal/fulltext/10.1097/gme.0000000000002386

3. Roberts, Nicole F. “Despite $65 Billion A Year Sleep Aid Market, Americans Remain Sleep Deprived.” Forbes, 20 Mar. 2022.

4. Irwin, Michael, et al. “Partial Sleep Deprivation Reduces Natural Killer Cell Activity in Humans.” Psychosomatic Medicine, 1994.

Yet, when we rely on external chemistry and technology, we completely overlook what actually manufactures collagen, clears cellular waste, and regulates the hormones giving your skin that youthful glow, boosting energy, and stabilizing mood. It happens for free, every night, regardless of whether you spend thousands of dollars on expensive treatments and regimens. Hear me out, I love a good facial for the experience but at almost 54 my daily rituals have left me with beautiful skin. That is why I am here. To help you build your foundation and make it rock solid. Then you can fill in any gaps with the numerous options we are blessed to have in this day and age.

By the Numbers

💰 $150B+ spent globally each year on anti-aging skincare, supplements, and treatments

💉 $21.4B U.S. med spa industry, growing 14%+ per year

💊 77% of U.S. adults take supplements, skin health is one of the fastest-growing categories

🦴 70% of midlife women experience musculoskeletal symptoms of menopause, including muscle and bone loss

🌙 $0 cost of the nightly biological process that actually does the repair work

Every night, when you close your eyes to sleep, your body runs a full maintenance cycle. Repair, detox, hormone production, cellular renewal. It’s not a metaphor. It’s the actual job your body is doing while you’re unconscious. Miss this deep sleep consistently, and you miss the maintenance window, whether or not you’re doing everything right at the gym. How effective this repair system functions depends entirely on you and your daily choices.

Here are five ways sleep is quietly delivering in the background in the deep night, what serums, supplements, and spa treatments only promise.

1. Growth Hormone Release

Did you know your body’s biggest release of human growth hormone happens during deep, slow-wave sleep, and for midlife women, this is where some of the most important protective work of the night happens. But go to bed too late and you’ll miss the magic. Deep sleep is prioritized in the early stages of the night. Your body will not make it up later.

Growth hormone works alongside IGF-1 (a hormone it signals the liver to produce) to stimulate protein synthesis and maintain lean muscle tissue. This has massive ramifications, as we all hear daily how muscle mass naturally starts declining in your 30s and accelerates further through perimenopause and menopause, a process called sarcopenia. Raise your hand if you know and eat your daily protein macros! This nightly growth hormone rhythm is one of the body’s main windows for rebuilding and protecting that muscle. Let me be clear. You can hit your protein macros, do your recommended strength training yet only be getting marginal improvement because it is during the deep sleep phase that your body is able to process those daily actions and make the improvements. I am constantly reminding my 16-year-old son of this important biological fact. Muscle growth/preservation happens during sleep.

But it does not just stop with muscles. What is one of the other major concerns as we age? Bone density. Again I see first hand the consequences of a fall later in life in my work with the elderly. No surprise here that the same hormone also stimulates osteoblast activity, the cells responsible for building new bone. Bone density loss accelerates as estrogen declines in midlife, and nightly growth hormone release is quietly protecting bone density in a way that daytime calcium alone cannot replace.

Lastly, let’s talk about collagen production for skin and tissue repair. If you guessed the nightly growth hormone rhythm, you are correct. While no one wants sagging skin or wrinkles, for the majority of midlife women, muscle loss and bone density are the more pressing concerns, and our sleep dictates whether we are winning or losing this nightly battle.

No wonder the workout advice never mentions this part. They say to sleep, but then also advocate for the 4am alarm and the workout that gets top billing. What I hope you take away is how vital sleep is in the protection of your bones and muscle. Without sleep, you are building your health on a sandy foundation rather than a firm one that supports you when life’s storms hit.

Don’t just take my word for it, this peer-reviewed research backs the mechanism: growth hormone secretion is tightly linked to slow-wave sleep, with the majority of the day’s pulse occurring in the first sleep cycles of the night (Van Cauter et al., 2000).

2. Glymphatic Clearance

Glymphatic what? I know it’s a big medical word. It’s ok I am here to help you understand. That is what nurses do best. Every night your brain calls in its own cleaning service called the glymphatic system, and it only runs at full capacity while you sleep. Its job is to flush out the metabolic waste that builds up while you’re awake. This is the waste responsible for your brain fog and cognitive decline. Again, this rarely makes it out of academia into the mainstream conversation about aging. However, it explains why a bad night’s sleep leaves you foggy the next day, and why chronic poor sleep is one of the most overlooked contributors to the mental sharpness women fear losing in midlife. Everything gets blamed on hormones, yet so much comes down to lifestyle choices.

This is very serious though, we have seen a generation who have suffered from cognitive decline sometimes starting in a woman’s 50s. This nightly clearance system removes two specific proteins, amyloid beta and tau. These same proteins build up and form the plaques and tangles characteristic of Alzheimer’s disease. There is solid science backing this. A landmark human trial published in Nature Communications found that during normal sleep, glymphatic clearance actively moved amyloid beta and tau out of brain tissue and into the bloodstream overnight, while sleep deprivation blunted that clearance. Epidemiological research has separately linked chronic sleep disruption to increased Alzheimer’s risk, and biomarker studies show that even in cognitively healthy people, short sleep duration and poor sleep quality correlate with greater Alzheimer’s-related protein buildup, years before any symptoms would appear.

Sleep is not just protecting how sharp you feel the next day. It is one of the most significant modifiable levers you have in your control to help prevent long-term dementia and Alzheimer’s risk. There is not a supplement or cognitive app that can replace this.

I find this research genuinely exciting: glymphatic clearance has been shown to increase dramatically during sleep compared to wakefulness, suggesting sleep serves a distinct restorative function for the brain that waking rest cannot replicate (Xie et al., 2013).

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3. Cortisol Regulation

It feels like at everywhere someone is talking about cortisol and how to lower it. But cortisol is not inherently bad. It serves very important roles in our physiology. I feel that most people are ignoring, or are ignorant of, a very important part of cortisol management. It’s relationship to melatonin. Our bodies run on cycles. We all know about our menstrual cycle, but most women have never heard of the cycle between cortisol and melatonin. No, you cannot just take a melatonin pill for this. I am talking about intrinsic melatonin. When melatonin rises, cortisol is supposed to fall. When cortisol rises, melatonin is supposed to fall. This isn’t a minor biological detail, it’s one of the oldest rhythms your body runs on, and modern life has thrown it completely out of balance. What if we are not making enough intrinsic melatonin to keep this cycle harmonized. Maybe it’s not a too much cortisol problem but a not enough melatonin problem.

For most of history, this cycle ran on autopilot. Darkness triggered melatonin, melatonin rose and cortisol fell, the body effortlessly dropped into repair mode overnight. Today we have artificial LED blue light late into the night, screens in bed, stress that feels like it never fully switches off. All of these things keep cortisol elevated and suppress melatonin at the critical hour it is supposed to be taking over. The two hormones are still trying to harmonize as they always have, but modern life tips the scales in favor of cortisol. The sad thing is most people are not even aware of this connection.

Add poor sleep to the mix and now your stress hormone, cortisol, remains elevated long after it should have settled. Which means melatonin, and everything melatonin is responsible for overnight, never gets its full turn. Not good if we are trying to reverse age or just stay healthy into our later years. Chronically elevated cortisol also breaks down collagen, drives inflammation, and shows up on your face as puffiness and dullness. Inflammation itself carries with it a host of chronic medical issues.

So many women are treating skin inflammation topically while the actual driver, an out of balance stress-hormone system, running on too little sleep, goes completely unaddressed. You cannot cream your way out of a hormone problem, and you cannot out-supplement a cycle that is out of balance and not being addressed at the root.

The harmonious relationship between these two hormones is well-established in circadian research: melatonin onset typically occurs during the body’s lowest point of cortisol secretion, and the two rhythms are designed to move opposite each other across the 24-hour cycle (Zisapel, 2005). Sleep-restriction studies confirm the downstream effect: even partial sleep deprivation produces measurable increases in evening cortisol levels the following day (Leproult & Van Cauter, 2010).

4. Cellular Repair and DNA Maintenance

Sleep is when your cells do their maintenance work, including repair processes tied to DNA integrity. This is deep, unglamorous, unmarketable biology, and it may be the most important item on this list.

In 32 years of nursing, I’ve watched our medical system treat aging as inevitable and unpreventable, something to manage with prescriptions once it shows up as disease. This model always bothered me and it is what led me to do more research. Look beyond mainstream, ask deeper questions, to learn the parts of healing that cannot be prescribed. These cellular repair systems happen every night, how effective they are is dependent on our knowledge and personal daily rituals.

This emerging research on sleep and cellular aging biomarkers continues to build support for this connection, including studies now linking poor sleep quality to shorter telomere length, a marker associated with cellular aging (Prather et al., 2015).

5. Hormonal Regulation

Every major hormone your body needs for optimal function, progesterone, testosterone, estrogen, cortisol, traces back to the same starting material: pregnenolone. Why is this important and what does sleep have to do with it? Well, chronic poor sleep keeps your body stuck in stress mode, prioritizing cortisol production over the hormones responsible for how you feel, look, and age. Remember our bodies will always choose immediate survival over long term health. The problem is we are no longer running from a tiger, we are actively making choices that give the same signal.

Let’s take testosterone as an example of what that actually looks like day to day. Do you even know what testosterone does in a woman’s body? You are not alone, most women have never been told testosterone is doing anything for them at all. Until midlife hits and suddenly they are given a testosterone prescription. Let’s dig a little deeper. Testosterone works alongside growth hormone to help maintain the lean muscle tissue talked about in section 1. It has a well-documented role in libido and sexual function which is often one of the first things women notice fading in perimenopause and menopause. With nothing linking it back to sleep. It also contributes to bone density independently of estrogen, acting as a second hormone quietly doing the same protective job as the growth hormone pathway above. Testosterone plays a role in mood, motivation, and mental drive. I’m not talking about a mood disorder, more like the engine running quieter than it used to. Lack of stamina.

See the connection? Poor sleep lowers testosterone. Lower testosterone means less support for the muscle you’re trying to maintain, a sex drive that’s gone quiet, lack of motivation and to top it off, weaker bones. This often gets chalked up to “just getting older” or “menopause,” when an important piece of it is really how well you slept last night, last month, or last year.

For midlife women, this is the piece that gets the least attention, because “sleep better” doesn’t sell like “take this supplement” does. However, the hormone most responsible for your youthfulness starts with a single upstream choice your body makes every night: survival, or health.

Like the other points the research is well-documented: sleep restriction has been shown to significantly reduce testosterone levels in as little as one week (Leproult & Van Cauter, 2011), a hormone shift with real implications for the entire cascade beneath it.

Where This Leaves You

None of this shows up on a standard lab panel until it’s gone pretty far. Biology is free, your body runs this system every night, 365 days a year. The question is how efficiently it is happening. Is your foundation strong so that everything you add is getting maximum benefit. I am pro foundation not anti supplement. Don’t put the cart before the horse as the saying goes.

Knowing how to actually fix your sleep, especially once hormones, stress, and years of habits are tangled together, is a different thing entirely. That’s not a knowledge deficit you solve by reading one more article. It’s the work I do one-on-one with women who are ready to stop guessing.

I hope the connections made here help you analyze your daily choices and rituals to improve your foundation. That is the goal here. If you haven’t subscribed, I welcome you to our community to keep learning what mainstream advice tends to leave out. If you’re ready for a guide rather than another list, that’s exactly what coaching is for.

Align your day. Restore your night.

This post reflects an educational, general-audience summary of sleep science drawn from both functional and clinical perspectives. It is not a substitute for individualized medical advice.

References

1. Dagum, P., et al. “The glymphatic system clears amyloid beta and tau from brain to plasma in humans.” Nature Communications, 2026. https://www.nature.com/articles/s41467-026-68374-8

2. Leproult, R., & Van Cauter, E. “Effect of 1 week of sleep restriction on testosterone levels in young healthy men.” JAMA, 2011. https://pubmed.ncbi.nlm.nih.gov/21632481/

3. Leproult, R., & Van Cauter, E. “Role of sleep and sleep loss in hormonal release and metabolism.” Endocrine Development, 2010. https://pubmed.ncbi.nlm.nih.gov/20351469/

4. Prather, A. A., et al. “Sleep and telomere length: cross-sectional and longitudinal analyses.” Sleep Health, 2015. https://pubmed.ncbi.nlm.nih.gov/27187727/

5. Van Cauter, E., Leproult, R., & Plat, L. “Age-related changes in slow wave sleep and REM sleep and relationship with growth hormone and cortisol levels in healthy men.” JAMA, 2000. https://pubmed.ncbi.nlm.nih.gov/10714729/

6. Wright, V. J., Schwartzman, J. D., Itinoche, R., & Wittstein, J. “The musculoskeletal syndrome of menopause.” Climacteric, 2024. https://doi.org/10.1080/13697137.2024.2380363

7. Xie, L., et al. “Sleep drives metabolite clearance from the adult brain.” Science, 2013. https://pubmed.ncbi.nlm.nih.gov/24136970/

8. Zisapel, N. “The relationship between melatonin and cortisol rhythms: clinical implications of melatonin therapy.” Drug Development Research, 2005. https://onlinelibrary.wiley.com/doi/10.1002/ddr.20014

Sleep has macros too, and this isn’t something I just made up. Sleep scientist Dr. Matthew Walker, the UC Berkeley researcher behind Why We Sleep, teaches that good sleep comes down to four essential components he calls the four macros of sleep: Quantity, Quality, Regularity, and Timing. Dr. Walker does not mince his words, and hitting all four isn’t optional, it’s what actually determines whether your sleep is doing its job. It’s important to note here that a fancy sleep monitoring tool is not needed. You know how you feel when you’ve slept well. You do not need a monitor to tell you this. Nursing 101 has always been trust the patient, not the monitor. The same applies here. Trust your body and how you feel.

In my experience, especially for women, I feel Dr. Walker is missing an important macro. So five macros, not four, are what actually move the needle for midlife sleep specifically. This macro is one we are all trying to improve, often with little success. I have found that once you start to master the first four, the fifth will naturally fall into place.

Remember, this process is going to take time, so give yourself grace. Real, lasting sleep change could take months to undo years of circadian neglect. Once you are consistent, like dominoes, all the pieces will fall into place. Starting with your circadian rhythm, then your hormones, your energy, your mood, your cravings, and much more suddenly come into alignment. This is exactly the work I do with the women I coach one-on-one. I am the guide, they are the masters.

Just like nutrition, you don’t need to master the entire system before you start hitting your numbers. You just need to know what your macros actually are. So let’s get into it — the five macros every midlife woman should be focusing on to build a foundation for better sleep

Macro #1: Get Outside

Light is the strongest signal your circadian clock responds to, and it’s a core part of what Walker calls Timing — how well your sleep aligns with your body’s natural rhythm. However, it does not stop at morning light. This is about your relationship with light across the day. From sunrise to sunset, our eyes and skin are collecting light data.

Get outside first thing in the morning.

Everything starts with sunrise and morning light. This is the anchor for your circadian rhythm, including how easily you will fall asleep that same night. A few minutes outside, no sunglasses, ideally within an hour of waking, is enough to start.

Get natural light during the day when you can.

Your circadian clock isn’t just reading one morning signal — it is constantly tracking data across the entire day. Time outside at midday, even a few minutes, reinforces the rhythm your morning light started.

Finally, sunset.

As natural light fades in the evening, your body is supposed to start its own wind-down. This is where most women are wired and tired. It’s okay if that is you — you are learning tools to fix that. Step outside, and anchor your circadian rhythm instead of letting indoor, artificial light create biological chaos and confusion.

Macro #2: Artificial Light

Once you understand the importance of natural light, the next macro is controlling artificial light signals after dark.

Dim the lights an hour before bed.

LED lights today are bright, blue-heavy, and not anywhere near what is natural for our biology. Overhead lamps, phone screens, and TVs all give your brain the same signal the noon sun does: stay alert. Dimming the lights around your home in the hour or two before bed reduces that signal and gives your body room to start its natural melatonin rise. Using candles, incandescent bulbs, or halogen bulbs will help more — think firelight, anything amber colored.

Sunrise to sunset during the day, and managing artificial light after dark — simple ways your first two macros work together. These things all work simultaneously so your body can make its own intrinsic melatonin.

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Macro #3: Environment

Your bedroom atmosphere is its own macro. This is where Walker’s Quality macro — the depth and restorative nature of your sleep — comes into play. Two levers matter most here: temperature and darkness.

Take a warm bath or shower, 1 to 2 hours before bed.

This one feels counterintuitive, but it works: a warm bath doesn’t cool you down directly. It warms your skin, which widens the blood vessels in your hands and feet (vasodilation). That pushes warm blood to your body’s surface, where it can radiate out quickly once you’re out of the water, producing a real drop in your core temperature shortly after. It is that temperature drop that is part of what triggers sleep onset.

Timing here matters more than you’d expect. Aim for 1 to 2 hours before bed, not right before, as your body needs a few minutes after the bath for the cooling effect to kick in.

Keep the room cool and dark.

Falling asleep isn’t just a mental process — it’s a biological one. Your core body temperature naturally drops as part of falling asleep, and a room that’s too warm or too bright can interrupt that drop before it’s finished. Strive for somewhere in the 65 to 68°F range as a starting point. Cooler here helps sleep onset. Midlife women are no strangers to hormonal changes and night sweats, so let how you actually feel guide the exact number. Next, keep your room dark with blackout curtains or a sleep mask. A dark room helps prevent melatonin disruption.

Macro #4: Routine

Our bodies love routine. Consistency is the glue of your day, not just your bedtime. This is Walker’s Regularity macro, and of the four he names, it’s the one most women underestimate.

Pick one wake-up time and stick to it, even on weekends.

Of everything here, this one habit is what I want you to keep long after the others feel automatic. Routine does more for your sleep than you think. It’s what lets your internal clock stop resetting itself every few days. It is what makes your morning light exposure land at the same time daily, strengthening that signal from Macro #1.

Keep your eating and exercise schedule consistent too.

Your circadian clock doesn’t just respond to light. There are several levers you can pull here, including when you eat and when you move. Meals and workouts at wildly different times from day to day send your body mixed cues about what time it thinks it is. Create rituals around your eating and exercise times — make them special, more than routine. By doing this, you will help your sleep and everything else fall into sync with them.

(Walker’s fourth macro, Quantity — simply how many hours you’re getting — matters here too. Most women need somewhere in the 7 to 9 hour range, and that number doesn’t shrink just because midlife gets busier. If Macros 1 through 4 are dialed in and you’re still short on hours, that’s the schedule conversation worth having.)

Macro #5: Stress

This is the macro I added that you won’t find in Walker’s research, mainly because it’s less about sleep physiology and more about the reality of midlife life. Let’s talk about stress.

Identify and actively manage your tension before bed.

Hopefully, if you are locked in on Macros 1–4, your body will do some of the heavy lifting on this one. Remember, when you align your circadian rhythm, your hormones, mood, and energy will follow. If you are making intrinsic melatonin, then the natural melatonin/cortisol cycle will come back into balance. When this happens, your nervous system gets the signal to relax. Your parasympathetic nervous system can now do its job. However, if after all of the above you are still wired and tired, implement a nightly unwind ritual. It doesn’t need to be elaborate: a few minutes of slow breathing, a short walk, journaling, a brain dump, or simply naming what’s on your mind before bed all count. The goal isn’t to eliminate stress — it’s to signal to your body that it’s safe to let go of it for the night.

It Will Take Time

Hitting these five macros is a real, meaningful start to better sleep. For many women, it’s the first time anyone has begun to explain the why behind their sleep instead of just handing them a list or prescribing a medication. Macros are the foundation, not the finish line. The deeper work — the hormonal shifts of perimenopause and menopause, the stress patterns that have kept you wired at night, the habits that took years to build — needs real support to undo. So start here, and remember to give yourself grace in the process. Subscribe to keep learning more ways to improve, and/or to work with me one-on-one. If you get your sleep macros dialed in and want a guide for the rest of it, that’s exactly what I’m here for.

Align your day. Restore your night.

This post reflects an educational, general-audience summary of sleep science. It is not a substitute for individualized medical advice.

References

1. Walker, M. Why We Sleep: Unlocking the Power of Sleep and Dreams. Scribner, 2017.

2. Walker, M. “Dr. Matt Walker: Protocols to Improve Your Sleep.” Huberman Lab, 2024. https://www.hubermanlab.com/episode/guest-series-dr-matthew-walker-protocols-to-improve-your-sleep

3. Blume, C., Garbazza, C., & Spitschan, M. “Effects of light on human circadian rhythms, sleep and mood.” Somnologie, 2019. https://pmc.ncbi.nlm.nih.gov/articles/PMC6751071/

4. Cajochen, C., et al. “Evening exposure to a light-emitting diode (LED)-backlit computer screen affects circadian physiology and cognitive performance.” Journal of Applied Physiology, 2011. https://journals.physiology.org/doi/full/10.1152/japplphysiol.00165.2011

5. Haghayegh, S., et al. “Before-bedtime passive body heating by warm shower or bath to improve sleep: A systematic review and meta-analysis.” Sleep Medicine Reviews, 2019. https://www.sciencedirect.com/science/article/abs/pii/S1087079218301552

6. Kräuchi, K. “The human sleep-wake cycle reconsidered from a thermoregulatory point of view.” Physiology & Behavior, 2007. https://pubmed.ncbi.nlm.nih.gov/17049364/

7. Sleep Foundation. “The Best Temperature for Sleep.” Reviewed 2025. https://www.sleepfoundation.org/bedroom-environment/best-temperature-for-sleep

Here is the piece I wish someone had explained to me years ago, especially once I hit my 40s and 50s: sleep does not begin at bedtime.

It begins the moment you wake up.

The Nighttime Trap

Most of the advice midlife women are handed about sleep is nighttime advice. A better mattress. A supplement. A sound machine. A stricter bedtime. A new nightly routine.

I understand why — bedtime is where the problem finally shows up. That’s where you notice you’re wide awake, or waking at 3 a.m., or lying there doing math about how many hours are left before the alarm.

But bedtime is rarely where the problem starts. By the time you’re in bed, your body has already spent 16 hours collecting information about what kind of day it just had — and it’s simply reporting back.

You Have a Clock in Every Cell

Somewhere in nursing school, I learned the word “circadian” and filed it away as a vocabulary term. It would take years — and a lot of exhausted mornings — before I understood what it actually meant for my own body.

You are not just tired or not tired. You are running on a clock — an internal, cellular clock that governs when cortisol should rise, when melatonin should release, when your body temperature should drop, and when your brain should feel alert or ready to rest. This clock exists in nearly every cell of your body, and it is set — every single day — largely by light.

Not caffeine. Not willpower. Light.

This is why two women can go to bed at the exact same time, in the exact same dark room, and one falls asleep easily while the other stares at the ceiling. Bedtime is not where sleep is decided. The day is.

Morning Light Is Not a Wellness Trend — It’s a Signal

I started watching the sunrise once I understood what light actually is to the body — not ambiance, not a mood, but a photobiological, hormonal, and chemical signal read directly by the brain. Specialized cells in your retina send that signal straight to the suprachiasmatic nucleus, the master clock sitting in your hypothalamus that keeps nearly every other clock in your body on time. Once I understood that, sunrise stopped being something pretty to look at. It became vital to my wellbeing.

Morning light — real, outdoor light, even on a cloudy day — hits receptors in your eyes and tells your brain: the day has begun. This single signal sets off a cascade: melatonin production stops, cortisol rises to give you appropriate morning energy, your internal clock resets, and a timer begins that will, for most people, shape when melatonin is released some 14 to 16 hours later to help you sleep.

This was my aha moment: your bedtime starts taking shape before 9 a.m.

Skip the morning light — wake up in a dim room, get in the car, sit under fluorescent light all day — and that signal never fully arrives. Your internal clock stays foggy. Cortisol can rise later and less predictably. And by the time night comes, your body isn’t entirely sure what time it is either.

The Body Is Always Receiving Data

Your body is constantly receiving data — inputs that can either help it regulate or quietly work against it. Light is one of the loudest inputs it reads all day long, not just at bedtime, when we finally try to get it to cooperate. Every bit of real outdoor light exposure during the day, every walk outside, every few minutes spent outdoors on a break, is data reinforcing the same signal: this is day, be alert, be steady. And every dim, screen-lit evening feeds it the opposite input, at exactly the wrong time.

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Light alone doesn’t build the foundation — it’s one critical piece of a larger system. Rhythm and routine, the atmosphere you sleep in, and how you’re carrying stress during the day are all inputs your body is collecting too — all feeding into the same nighttime outcome. Light is where we’re starting, because it’s the loudest input your body responds to — but the rest of that system matters just as much, and we’ll walk through it together in the weeks ahead.

We are marketed the idea that sleep struggles are isolated to nighttime — that we can easily fix them in twenty minutes and reap the benefits of a good night’s sleep. There’s some truth in that; the right products and rituals can genuinely help. But no supplement, sound machine, or bedtime routine can correct, in twenty minutes, what an entire day of disconnected signals failed to establish.

Why This Matters More in Midlife

Remember that clock we talked about — the one that exists in nearly every cell of your body, not just in one master control center? That detail matters more in midlife than it did at twenty-five.

Light is still the signal — that never changes. What changes in midlife is how much margin you have left. Decades of inconsistent light, irregular sleep, and unmanaged stress accumulate, and the circadian system that once bounced back easily starts to hold onto the mismatch. The clocks don’t all drift out of sync in the same direction, at the same pace, either. Some fall behind. Some race ahead. You end up with clock chaos — millions of cells, each one running on its own slightly different time zone, all trying to function as one coordinated system.

This is where estrogen and progesterone often take the full blame — and they’re not innocent; they do influence the clock genes in every cell of your body. But they’re not the whole story either. Light is still the primary signal keeping the entire system synchronized in the first place, and decades of inconsistent light exposure leave that system with far less room to absorb a hormonal shift gracefully.

After decades of mismatched circadian signaling, that accumulated mismatch is the real problem. Not the hormones alone.

Think about how you feel after crossing four or five time zones. Foggy. Off. Hungry at the wrong hours, wide awake at the wrong ones, unable to fully drop into deep sleep even when you’re exhausted. Now imagine that mismatch isn’t happening once, for a week, in one body clock — it’s happening continuously, in millions of cells at once, each one a little out of step with the others, all still expected to regulate hormones, repair tissue, and keep you functioning at full capacity every single day.

That is part of why sleep that once felt automatic can start to feel fragile, unpredictable, or gone entirely in your 40s and 50s. It is not that your body has stopped working. It is that the same light signal now needs to be clearer and more consistent to do its job — because there are more clocks depending on it, and less margin for that signal to be weak or inconsistent.

This is not a flaw. It is information — a body asking, more directly than before, to be worked with instead of overridden.

Align Your Day, Restore Your Night

This is where the phrase comes from — the one you’ll see throughout this space.

Restoring your sleep does not start with a new pillow, a new supplement, or a stricter bedtime rule. It starts earlier — with light, with rhythm, with letting your body clearly know, hour by hour, what time it is.

You cannot out-supplement a day your body never understood.

But you can begin again tomorrow morning — not with pressure, not with a perfect routine, just with a few minutes of light and the smallest signal to your body: the day has begun, and I am listening to you now.

That is where alignment starts. In the next post, we’ll walk through the full picture — the five foundations that shape sleep all day long, not just at night.

Align your day. Restore your night.

This post reflects an educational, general-audience summary of circadian and sleep science. It is not a substitute for individualized medical advice.

References

1. Diniz Behn, C., et al. “The dim light melatonin onset across ages, methodologies, and sex and its relationship with morningness/eveningness.” PMC, 2023. https://pmc.ncbi.nlm.nih.gov/articles/PMC10171641/

2. Hatcher, K.M., et al. “Modulation of circadian rhythms through estrogen receptor signaling.” European Journal of Neuroscience, 2020. https://onlinelibrary.wiley.com/doi/abs/10.1111/ejn.14184

3. “Low estrogen may worsen the circadian effects of light pollution.” PNAS Journal Club, 2023. https://www.pnas.org/post/journal-club/low-estrogen-may-worsen-circadian-effects-light-pollution

4. “A prospective study to investigate circadian rhythms as a health indicator in women’s aging.” npj Women’s Health, Nature, 2025. https://www.nature.com/articles/s44294-025-00057-z

5. “Relationship between Circadian Phase Delay without Morning Light and Phase Advance by Bright Light Exposure the Following Morning.” Clocks & Sleep, 2023. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10594521/

6. Sellix, M.T., et al. “Sleep, Rhythms, and the Endocrine Brain: Influence of Sex and Gonadal Hormones.” Journal of Neuroscience, 2011. https://www.jneurosci.org/content/31/45/16107

7. “Sleep Disturbances in Menopause: Neuroendocrine Mechanisms and Clinical Implications.” MDPI, 2026. https://www.mdpi.com/2673-9488/6/2/22

8. “The Timing of the Melatonin Onset and Phase Angle to Sleep Onset in Older Adults after Uncontrolled vs. Controlled Lighting Conditions.” PMC, 2023. https://pmc.ncbi.nlm.nih.gov/articles/PMC10366720/

We live in a culture that teaches women to build health from the top down.

More supplements. More workouts. More meal plans. More productivity. More discipline. More tracking. More doing.

I understand the pull. I have tried plenty of the “right” things too — the plan, the product, the routine, the supplement, the next answer that would finally help me feel better.

Some of those things helped. But this is what I have come to believe, after years as a nurse and after my own long season of disrupted sleep:

If the foundation is exhausted, everything built on top of it works harder to maintain balance.

That foundation is sleep.

What Your Body Is Actually Doing While You Sleep

For years, I watched women push through exhaustion because they thought they had to. Coffee in the morning, wine in the evening. I have done it too — held a full day together on too little sleep and a lot of caffeine, searched for the thing that would help me feel better, without realizing my body was asking for something more foundational.

Sleep is not what happens when the day is over. It is not empty time, or wasted time, or the part of life we can keep borrowing from without consequence.

While we rest, the body is anything but inactive. It is:

Regulating hormones. Clearing waste from the brain. Supporting the immune system. Steadying mood and stress response. Repairing tissue. Organizing and saving memories. Restoring the energy we need to face the next day.

Here is the part most of us were never taught: when sleep is chronically short, cortisol does not stay contained to nighttime. It stays elevated into the next day, priming the body to feel wired and tired at once — hungry for quick energy, resistant to winding down, and less able to regulate mood and blood sugar. That is not a personality trait. That is chemistry responding to a foundation that hasn’t been laid.

The Resume Line I No Longer Believe

I once put “great at multitasking” on my resume as a compliment to myself.

I see it differently now. What I called multitasking was often just triage — the house, the work, the family, the appointments, the meals, the emotional load, all held together at once, none of it done as well as it could be with rest underneath it. We named the exhaustion a skill because naming it a cost felt too honest.

Life was never meant to be just survived.

Why Pushing Harder Makes It Worse

When we finally reach our limit, the advice we hear is usually to do more: wake up earlier, get to the gym at 5 a.m., push harder, make no excuses.

For some women, early movement feels wonderful. But for many exhausted midlife women, stacking a 5 a.m. demand on top of too little sleep — especially sleep cut short before REM — works against the very foundation they’re trying to rebuild.

I say that gently, because I know how hard so many women are already trying.

Sometimes the body does not need another demand. It needs darkness. Completion. Enough sleep before you ask it to perform.

Sleep is not weakness. It is how the body stays resilient, regulated, and able to heal.

We’ve all heard “you can sleep when you’re dead” — said almost like a badge of honor. I believe that phrase has done real harm. Your body does not treat rest as optional, and eventually, it will ask for what it needs.

Stop Asking What’s Wrong With You

For midlife women, this becomes even more important. Shifting hormones, changing stress tolerance, night waking, hot flashes, anxiety, blood sugar swings, brain fog — the sleep you used to count on suddenly feels unpredictable.

When that happens, many women ask: What is wrong with me?

I want to offer a different question. Not because symptoms should be ignored — because shame is not useful, and it’s rarely accurate.

What foundation is my body asking me to rebuild?

You Don’t Need Perfect Sleep. You Need This.

I think of sleep like the foundation of a house. Not glamorous. Not always the thing people see first. But it’s what holds everything else up. When it needs repair, everything above it has to work harder — the nervous system, the hormones, the brain, the mood, the energy — until you’re working harder just to feel like yourself.

Common, yes. But not something to dismiss as normal.

This is why I believe midlife women deserve to understand sleep from the foundation up — not through shame, not through fear, not through another quick fix, but through clear education and a real understanding of what the body needs in order to rest.

Because the answer is not always to add more. Sometimes the most productive thing a woman can do for her health is protect her sleep. Sometimes the most powerful health practice isn’t more effort — it’s repair.

That doesn’t mean every night will be perfect. Perfect sleep isn’t the goal. The goal is a foundation you can return to: a way to understand what your body is asking for, a way to support your natural rhythm when life gets full, a way to begin again without shame.

That is what I want this space to be.

Sleep is the ground everything else stands on

Sleep is not separate from your health. It is not the thing you get to after everything else.

It is the ground everything else stands on.

So we begin here — with rest, with repair, with honoring the body.

“Sleep is the golden chain that ties health and our bodies together.” — Thomas Dekker

In the next post, we’ll look at why so many midlife women are trying to fix sleep at the wrong end of the day — and what it actually takes to rebuild the foundation from the ground up.

Align your day. Restore your night.

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This post reflects an educational, general-audience summary of sleep science. It is not a substitute for individualized medical advice.

References

1. “Acute sleep deprivation disrupts emotion, cognition, inflammation, and cortisol in young healthy adults.” PMC, 2022. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9538963/

2. “Lack of sleep alters hormones, metabolism; simulates effects of aging.” UChicago Medicine, 1999. https://www.uchicagomedicine.org/forefront/news/lack-of-sleep-alters-hormones-metabolism-simulates-effects-of-aging

3. Leproult, R., et al. “Sleep loss results in an elevation of cortisol levels the next evening.” SLEEP, 1997. https://academic.oup.com/sleep/article-pdf/20/10/865/8564977/sleep-20-10-865.pdf

4. “Sleep Disturbances in Menopause: Neuroendocrine Mechanisms and Clinical Implications.” MDPI, 2026. https://www.mdpi.com/2673-9488/6/2/22

After 32 years as a registered nurse, and through my own sleep journey, I have come to believe this deeply:

Sleep is the foundation of health.

Not a luxury. Not laziness. Not something we should have to earn after everyone else is cared for. Not something we should be expected to sacrifice in the name of productivity, caregiving, or pushing through.

Sleep is where the body repairs. Where hormones communicate. Where mood stabilizes. Where the nervous system restores. Where the brain clears. Where energy is rebuilt. Where the body and mind have space to heal.

And yet, so many women, especially in midlife, are exhausted, wired, waking through the night, struggling with hot flashes or night sweats, feeling anxious about sleep, or wondering why what used to work no longer does.

I know this from my work. And I know this from my own life.

Where My Own Sleep Story Began

My relationship with sleep started when I was young. As a child, I was afraid of the dark and slept with the light on. For years, I thought my ability to sleep with light around me was almost a superpower. Now I know better. What felt like comfort at the time was also teaching my body something. Light is not neutral. Light is information. And the body is always listening. Years later, when I became a nurse and worked night shift, that relationship with light became even more complicated. Often, my first night on would turn into a 23-hour day

My kids would wake up around 9:30 in the morning, and they rarely napped. Then I would have to be at work by 6:45 that evening. I would work through the night under the most potent florescent lights, come home around 8:30 the next morning, and then try to sleep during the day. Most of the time, I could only sleep four or five hours. I tried so many things to force sleep.

I tried Ambien. I tried Benadryl. I tried Melatonin. At one point, I even slept in my closet because I was so desperate to create darkness and get rest.

In 2020, I knew cortisol was part of the problem. My body felt wired when it should have been winding down. So I discovered CBD oil, hoping it would help calm my system enough to sleep.

And it did help some. But looking back, I can see I was still searching for something outside of me to fix what I did not yet understand. I was always looking for the pill, the product, the supplement, or the one thing that would finally make sleep happen.

It was not until I began to understand the relationship between melatonin and cortisol, between light, darkness, stress, and circadian rhythm that sleep finally started to come in a deeper way.

Not just sedated sleep. Not just “I made it through the night” sleep. But deep, restorative sleep. The kind of sleep where the body feels like it can finally repair, reset, and restore.

What I did not understand then was how much light mattered. I did not understand circadian mismatch. I did not understand how deeply my internal clocks were being disrupted by working against the natural rhythm of light and dark.

Even after I stopped working night shift, I remained severely sleep deprived for years. I thought I was just a night owl. Yet I still struggled.

And like so many women, I thought the problem was me. I thought sleep was just supposed to happen. If it did not, I assumed the answer was to try harder, take something, push through, or hope the next night would be better.

But sleep is not something we force at bedtime.

The Turning Point: Discovering Light

That began to change when I discovered light.

In November of 2021, I started watching the sunrise routinely.

Sleep is shaped by the rhythm of the entire day.

It sounds simple, but it changed the way I understood sleep.

I began to learn that morning light is not just beautiful, it is biological information. It helps anchor the circadian rhythm. It gives the body a signal that the day has begun. And when the body receives the right signals during the day, it is better prepared to restore at night.

Our bodies are designed to receive signals from nature, sunrise, daylight, sunset, and darkness. These signals help guide our internal clocks, our sleep-wake rhythm, our hormones, our energy, and our ability to restore at night.

And in modern life, many of those signals have been disrupted. We wake indoors. We spend our days under artificial light. We stare at bright screens after sunset. We eat, work, scroll, worry, and collapse into bed expecting the body to know it is time to sleep.

But the body is always listening. The body is responding to the signals we give it.

What This Means for You

Now, while so many of my fellow midlife women are struggling through perimenopause and sleep disruption, I sleep soundly most nights. And on the nights I do not sleep well, I usually understand why.

I can look at my light exposure, my stress, my evening rhythms, my environment, and the signals I gave my body that day. I no longer feel helpless around sleep. I have a foundation to return to.

That is what I want for other women.

Not perfection. Not fear. Not another quick fix.

A foundation.

A way to understand what is happening in the body and how to begin aligning the day so the night can restore.

That is why this space exists.

The Sleep Nurse is a warm, science-informed space for midlife women who want to understand their sleep from the foundation up — through natural light, restorative rhythms, curated rituals, and circadian alignment.

Here, we will not chase sleep with shame. We will learn how to align with it.

We will explore morning light, sunset rituals, artificial light at night, sleep atmosphere, hormone-supportive rhythms, stress and tension, and the simple daily practices that help prepare the body for true rest.

My hope is that this space gives you clear education, practical rituals (so much better than routine), and a foundation you can return to when sleep feels confusing or out of reach.

We will honor the body instead of fighting it. We will return to rhythm. And we will begin with the belief that sleep is not separate from health.

Sleep is the foundation.

I used to think sleeping with the light on was my superpower. Now I understand that honoring light and darkness is part of how we restore the body.

If you are a midlife woman who is tired of being tired, I want you to know this:

You are not broken. Your body may simply be asking for different support. A different rhythm. A different relationship with rest. A different way of moving through your day so your nights can begin to restore.

That is the work we will explore here together.

Welcome to The Sleep Nurse.

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Align your day. Restore your night.

I’m also a wife of 25 years, 8 of that a Navy wife (IFYKYK), a mom of three, and happily sharing life with three cats and a standard Goldendoodle.

I started The Sleep Nurse because I kept hearing the same thing from women my age: "I know I should sleep better, I just don't know why I can't." None of the well meaning gurus were talking about or explaining the why. Just more tips that often added to the overwhelm rather than actually repairing that sleep relationship..

Here's the thing: sleep isn't a switch you flip on at night when it's time for bed. It's the downstream result of light, rhythm, and hormones working in tandem, or working against each other, all day long. Once you understand that mechanism, sleep stops feeling like a mystery you're trying to solve each night and starts feeling like something you and your body are working toward, together.

This is a space for midlife women who are tired of being tired, and ready to understand sleep instead of just chasing it.

Here, we’ll talk about natural light, circadian alignment, restorative daily rhythms, curated sleep rituals, hormones, stress, and the simple, free tools your body already has if you know how to use them.

Clarity instead of complexity.
Rhythm instead of constant optimization.
Practical action instead of information overload.
Self-responsibility instead of perfection.
Human connection instead of impersonal instruction.

I publish one thoughtful post each week, in the form of a podcast and text so you can choose the best way to learn the information. I include occasional notes and reflections along the way to show how I’m living these principles.

Think of this as a warm, science-informed corner of the internet where sleep starts making sense again.

I’m so glad you’re here.

Align your day. Restore your night

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