Body Clock And Hormones Overview

Dr Kirstey Holland 0:04

Circadian rhythm and hormones. Why your body clock sets the stage for every hormone you make. Hi beautiful. This week I want to talk to you about your body clock and why it matters so much for your hormones during perimenopause. Most of us have lost touch with our own natural rhythms. We know our children's needs, our partners' needs, even our dogs' needs, better than we know our own body, what our own body is asking for. One of the clearest ways we have lost that connection is in how we treat our circadian rhythm. Each of us now lives with a darkness deficiency that affects our melatonin and our sleep, and a lightness deficiency because we do not go outside often enough to receive the light of sunrise. We spend our days indoors under fluorescent lighting, screens and zoom calls, and our nights lit up when our body is expecting darkness. Your circadian rhythm is the roughly 24-hour internal clock that tells your body when to be alert and when to rest. It is run by light and darkness, and it sets the timing of two hormones that shape how you feel every single day, cortisol and melatonin. In a healthy rhythm, your cortisol is highest in the morning, which is what wakes you up and gets you moving, and it tapers down through the day so that by night it is low and melatonin can rise to bring on sleep. When this rhythm is working, you wake feeling refreshed and you sleep deeply. When it is inverted, or opposite to what it should be, you get the opposite. Low cortisol in the morning, so you wake exhausted and flat, and high cortisol at night, so you lie there wired and tired, unable to sleep even though you're shattered. In perimenopause, this becomes harder to

Modern Life Breaks Your Rhythm

Dr Kirstey Holland 1:52

hold together and it is not your imagination. Sleep architecture genuinely changes during this phase, with around 61% of women experiencing significant disruption. Progesterone, which begins to decline years before estrogen does, is one of the main reasons. Progesterone is a neurosteroid that promotes GABA activity in your brain, and GABA is what allows deep restorative sleep. As progesterone declines, that support for sleep weakens. At the same time, low melatonin and a disrupted cortisol pattern can explain exactly why you're waking at 3 a.m. and cannot get back to sleep despite feeling exhausted. This is the repair work of the hierarchy of healing because until your rhythm and your sleep are restored, your hormones do not have a stable foundation to rebalance on. Here is what I want you to understand. Your body clock is not a luxury lifestyle, it is a hormonal control system. When we restore your circadian rhythm, when your cortisol peaks in the morning and falls away by night, so melatonin can do its work, your sleep improves, your energy comes back, and your hormones have the steady base they need. I have watched this happen in my clinic many times. It is a foundation, and everything else in your healing depends on it. I want to begin with something simple that I hear almost every week in my clinic. A woman tells me she's exhausted all day, and then the moment her head hits the pillow, her mind switches on and she cannot sleep. Or she falls asleep easily enough and then wakes at 3 a.m., wide awake, staring at the ceiling. If that is you, I want you to know that this is not a personal failing and is not you doing something wrong. It is your body clock, and your body clock can be understood and restored. Today I'm going to explain what your circadian rhythm actually is, how it controls cortisol and melatonin, why perimenopause makes it harder to keep in rhythm, and

Wired At Night Exhausted Morning

Dr Kirstey Holland 3:57

what you can begin to do about it this week. Let me begin with what you are experiencing, because I want you to feel recognized before we get into the biology. You wake up tired even after a full night in bed. You feel flat and unmotivated in the morning, and then somehow more awake at 10 p.m. than you were all day. You wake in the small hours and cannot get back to sleep. Night sweats break into your sleep and pull you out of deep stages. None of this means your body is failing. It means your body clock has been thrown out of rhythm and your hormones are following it. Let's understand the biology.

Cortisol And Melatonin Explained

Dr Kirstey Holland 4:35

Let me explain the biology because once you understand it, it stops feeling random. Your circadian rhythm is your internal 24-hour clock, and it is set by light and darkness. It controls the daily timing of the two hormones. The first is cortisol, your main stress hormone, which should be highest in the morning. That morning rise is called the cortisol awakening response, and it is your body's natural alarm clock. The rise in cortisol in the first 30 to 60 minutes after you wake then moves you from sleep into alertness. The second is melatonin, your sleep hormone, which should rise at night as the light fades to bring on sleep. In a healthy rhythm, these two work in opposite directions across the day. They are agonists. Cortisol is high in the morning and low at night. Melatonin is low in the day and high at night. That opposition is what gives you energy when you want it and sleep when you need it. When you're camping under the stars away from the screens, your body naturally falls asleep at sundown and wakes with the sunrise because it is because it is following light and darkness the way it was designed to. Connecting symptoms to root causes. So let me connect your symptoms to what's actually happening. When your cortisol is too low in the morning, you wake feeling tired, flat, and unmotivated. When your cortisol is too high at night, you feel wired but tired, unable to fall asleep, even though you're exhausted. That is an inverted circadian rhythm. Your body clock flipped the wrong way around. And when your melatonin is low, that can explain why you're waking at 3 a.m. or struggling to sleep despite feeling shattered.

Why Perimenopause Disrupts Sleep

Dr Kirstey Holland 6:17

Perimenopause makes all of this harder and there are real reasons for it. Progesterone declines years before estrogen does, and progesterone is a neurosteroid that promotes GABA activity in your brain to create deep restorative sleep. As progesterone falls, that support for sleep weakens. Estrogen is fluctuating erratically at the same time, and night sweats break into your sleep and pull you out of the deep stages you need. This is why sleep architecture changes so much in perimenopause, with around 61% of women experiencing significant disruption. It is not in your head. Introducing the healing framework. This is repair work, the first phase of the healing hierarchy of healing. I do not try to rebalance a woman's hormones while her sleep is broken and her body cock is inverted, because there is no stable foundation to build on. We restore the rhythm first. In my clinic, I look closely at the cortisol awakening response and the diurnal cortisol pattern in relation to melatonin, because these stress and sleep hormones directly affect how you feel, how you sleep, and how your body responds to perimenopause. I use the Dutch test alongside foundational blood tests for this because it tells the story of how your hormones move across a full 24-hour period rather than a single point in time, and it shows both your cortisol pattern and how well you are producing melatonin. I want to tell you about a woman I call Cecilia. She came to me exhausted, especially on waking, and we confirmed she had an inverted circadian rhythm, low morning cortisol and a high nighttime

Repair First And Smarter Testing

Dr Kirstey Holland 7:56

cortisol. Over nine months we repaired her gut, brought more progesterone on board, and restored balance to her cortisol. Her rhythm came back. She began to experience a healthy dawn effect where her cortisol was highest in the morning, so she woke alert, no longer smashed, and lowest at night so she could sleep deeply. Restoring that dawn effect is one of the most powerful things you can do to feel like yourself again. Taking control and practical steps.

Light And Routine You Can Start

Dr Kirstey Holland 8:25

Here is what you can do this week, and none of it requires anything you do not already have. Get outside into natural light within the first hour of waking, because morning light is what sets your cortisol rhythm for the day. In the evening, dim the lights and reduce screens as the sun goes down so your body can produce the melatonin it needs. Try to mimic outside light. Keep your mornings and your bedtime at consistent times because your body clock loves regularity. Alcohol disrupts the deep restorative sleep stages that are already compromised by declining progesterone. So notice what it does to your nights and begin to track your own pattern because your body is giving you information every single day. When you want to track your sleep and energy, use the perimenopausal symptom tracker inside the Vitality Clinic, and the lifestyle, food, mood, and pain diaries are there too. You are in control of this. Your body clock can be restored, and when it is, everything else in your healing has a steady foundation. So, let's bring this together. Your circadian rhythm is your body clock, set by light and darkness, and it controls cortisol in the morning and melatonin at night. In perimenopause, declining progesterone, erratic estrogen, and night sweats disrupt it, which is why you wake exhausted or wake at 3 a.m. This is repair work and we restore the rhythm first so your hormones have a stable foundation. The most powerful place to begin is morning light, an evening window, and a consistent sleep and wake time.

Reflection Questions To Spot Patterns

Dr Kirstey Holland 9:59

I've got some powerful reflection questions for you. When during the day do you feel most awake and when do you feel most tired? What does your body do at night? Do you struggle to fall asleep or do you wake in the small hours? How much natural light do your eyes actually receive in the first hour after you wake? What does your evening look like in the hour before bed? If you wake at 3 a.m., what is usually going through your mind? How consistent are your sleep and wake times across a week? What have you been told about your sleep by a doctor and it didn't match what your body was telling you? What is one thing about your evenings that is within your power to change? How do you feel about the idea that your tiredness has a physiological cause you can address? What would it mean for the rest of your life if you woke up genuinely rested?

Bedroom Setup For Deeper Sleep

Dr Kirstey Holland 10:54

Some practical implementation tips. Get outside into natural daylight within the first hour of waking, ideally for 10 to 20 minutes, to set your cortisol rhythm for the day. As the sun goes down, dim the lights in your home and reduce screens so your body can begin producing melatonin. Keep your wake time and your bedtime consistent, even at the weekend, because your body clock responds to regularity. Notice what alcohol does to your sleep because it disrupts the deep restorative stages already reduced by declining progesterone. Track your sleep, energy, and mood using the perimenopausal symptom tracker inside the Vitality Clinic, alongside the lifestyle, food mood, and pain diaries. If your pattern points to a cortisol or melatonin problem, note it so you can discuss proper testing, such as the Dutch test with your practitioner. Furthermore, keep the room at a really cool temperature. Make sure that when you put your hand in front of your face you can't see it. If your room isn't dark enough, make sure to wear a night mask and make sure to wear earplugs if somebody next to you is snoring. I highly recommend sleeping naked, and I can't say enough about linen on linen for bed sheets. Some clinical insights.

Clinical Clues And Key Takeaways

Dr Kirstey Holland 12:22

The shape of that answer tells me whether her cortisol rhythm is inverted before any test comes back. Waking at 3 a.m. is one of the most common presentations I see. It's generally between 1 and 3 a.m. And it's frequently a melatonin and cortisol timing problem, rather than a purely hormonal one. Low menatonin and a disrupted dional cortisol pattern explains it far more often than most women have ever been told. I do not attempt to rebalance hormones while a woman's sleep is broken and her rhythm is inverted. Repair comes first. Restoring the dawn effect, cortisol high in the morning and low at night, is one of the highest leverages available in perimenopause. Progesterone's decline is underappreciated as a sleep issue because progesterone promotes GABA activity for deep sleep. Its loss shows up as disrupted sleep long before a woman connects it to her hormones. The Dutch test earns its place here because it shows the cortisol awakening response, the full diurnal cortisol pattern and melatonin production across 24 hours, which a single blood drawer cannot capture. Thank you so much for being here, beautiful, and I look forward to seeing you next week.