The Science of Hot Flushes: How Aligning With Your Body Clock and Meditative Practices Can Help You Stay Cool

The first reason is the role that estrogen plays in thermoregulation.

Estrogen plays a crucial role in keeping the body's temperature stable, and it does this by maintaining a wide thermoneutral zone—the range in which the body doesn't need to sweat or shiver.

As estrogen levels fluctuate and eventually decline, this thermoneutral zone narrows. What this means is that even small temperature changes in our environment and inside us biologically can trigger intense heat surges and excessive sweating.

This heightened temperature sensitivity is the reason why perimenopausal women experience sudden hot flushes and night-time overheating.

Another reason is the disruptions in our Circadian Rhythm.

Hot flushes are not random. They follow a circadian pattern and occur more frequently at night due to the body's natural cooling phase during sleep. Hormone fluctuations commonly affect our ability to produce adequate amounts of melatonin at night, which in turn prevents the body from efficiently lowering nighttime temperature, leading to more frequent and intense night sweats.

This disruption creates a cycle of poor sleep, stress, and more intense hot flushes.

We are beginning to see a pattern here, aren't we?

Once sleep is disrupted, a negative feedback loop begins:

- Night sweats wake women up repeatedly, reducing sleep quality.

- Poor sleep further disrupts the circadian rhythm, leading to irregular melatonin and cortisol levels.

- Increased stress and fatigue exacerbate hot flushes, making them more frequent and intense.

Heat regulation in perimenopause can be challenging, but when we develop intentional, mindful and consistent habits around our natural biological rhythms, we put ourselves back in charge by creating triggers that influence intended outcomes - which is less intense hot flushes and night sweats and better sleep overall, restoring balance and reducing discomfort, which is what we are all after in this time of life.

There are 5 things you can do to begin to train your brain to support you better in perimenopause.

1. Support Your Circadian Rhythm

Early morning sun exposure helps to reset your circadian clock, trigger early cortisol release and sets you up for the day. Also the brain releases a chemical called 'Adenosine' in the brain. This is a sleep compound that builds up throughout the day so that, if uninterrupted by long afternoon naps and caffeine in the late afternoon, starts to tell your brain it wants to be 'offloaded'.

It works in synergy with melatonin to get you ready for sleep. Too much science for a light blog read :-)

Blue light exposure in the evening from screens and LED lights disrupts the production of melatonin by tricking your brain into thinking it still needs to keep releasing cortisol.

Overhead lighting will do that to your brain as well. Turn off all overhead lights and settle into a habit of lowering your light intensity in the evening by integrating dimmer switches into your lighting plan. I turn the red light function on my phone on from 6 PM, and i light candles as part of my evening meditative ritual.

2. This next strategy is subjective, as i have found that, depending on what is going on in my life, one night of inconsistent sleep doesn't usually do as much damage- provided that my sleep schedule is consistent overall. So don't stress over the sleepless nights you may have the night before you have to travel or any similar event.

That said, maintain a sleep schedule to reinforce the body’s internal clock.

3. Optimise your sleep environment by keeping your room cool. The ideal temperature for sleep 16-18°C (61-65°F), according to my favourite sleep scientist, Dr Matthew Walker.

4. Use moisture-wicking bedding and breathable fabrics. Try cooling pillows or a fan to regulate temperature if you live in a hot environment.

5. Integrate a Robust Meditative Practice

I confess that this is the crux of this entire article, as i have found having a meditative practice has not only been a game changer in managing my perimenopause symptoms alongside environmental strategies; it has also been a game changer in everyday life.

Meditation and mindfulness have been shown to reduce the severity and frequency of hot flushes by calming the nervous system and increasing the body's resilience to temperature fluctuations.

✔ It activates the Parasympathetic Nervous System (PNS) – Meditation reduces stress-induced hot flushes by lowering cortisol and engaging the body's relaxation response.

✔It regulates the Hypothalamus – Since the hypothalamus controls both temperature and emotional responses, mindfulness can help stabilise the body's heat response.

✔It increases Interoceptive Awareness – Meditation enhances body awareness, helping women detect early signs of a hot flush and responding proactively.

✔It improves Sleep Quality – Mindful breathing and guided relaxation promote deeper, uninterrupted sleep, reducing the frequency of nighttime temperature surges.

What Are The Best Meditation Techniques for Perimenopausal Women

✔ Mindfulness Meditation: Sit quietly and focus on your breath.

When you sense the onset of a hot flush, observe the sensation with curiosity without reacting emotionally. It requires some practice but i promise that it is well worth the effort.

✔ Deep Breathing (Paced Respiration). These are slow, deep breaths, and they have been shown to reduce the intensity of a hot flush.

Try the 4-7-8 technique: Inhale for 4 seconds, hold for 7, and exhale for 8.

✔Body Scan Meditation, Yoga Nidra or NSDR ( Non Sleep Deep Rest): Lie down and mentally scan your body from head to toe, releasing tension in each area.

This helps reset the nervous system’s stress response and cool the body down.

✔Guided Imagery: Picture yourself in a cool, refreshing place (floating in water, standing in the snow).

Studies suggest that visualisation techniques can lower core body temperature by shifting the brain’s focus.

The common denominator to all these suggestions are the triggers that influence the chemical responses in your brain to create the intended outcomes you desire.

6. Consider Hormone Therapy (HRT) or Natural Alternatives

For some women, hormone replacement therapy (HRT) can help restore estrogen levels and reduce hot flushes. However, natural alternatives like Black cohosh, Soy isoflavones, and Flaxseed may also support thermoregulation without the use of synthetic hormones.

Each person is different, and the goal here is not to push a strategy forward as the best way to manage heat flushes effectively. I am providing options that each person can experiment with and see which one resonates with you the most.

Perimenopause is a challenging transition all on its own, but by understanding how circadian rhythms, temperature regulation, and meditation interact, we can take proactive steps to reduce the intensity of hot flushes, improve sleep, and regain control over their well-being.

By integrating a robust meditation practice alongside circadian-supporting strategies, we women can calm their nervous system, lower stress, and minimise the impact of hormonal fluctuations.

Would you like guidance on creating a personalised mindfulness routine for perimenopause?

Let’s chat in the comments!