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The New Science Of The Body Clock: How To Boost Your Immune System, Reclaim Your Energy & Improve Your Mental Health with Dr Kristen Holmes #479

Sep 24, 2024 2h 3m 24 insights
In our hyper-connected modern world, where we have access to artificial light and food around-the-clock, we've drifted far from our body’s natural rhythms. But what if reconnecting with these internal clocks could be the key to unlocking better health, more energy and even a longer life? My guest this week is Kristen Holmes, who is Global Head of Human Performance and Principal Scientist at WHOOP, a Science Advisor to Levels Health and Arena Labs, and a member of the Tactical Leadership Board of Sports Innovation Lab. In this conversation, we explore the world of circadian biology and how aligning our daily habits with our natural rhythms can transform our health. Kristen explains the far-reaching consequences of a disrupted circadian rhythm, from metabolic disorders and increased ageing to mental health challenges and lower immune function. We discuss the critical importance of consistent sleep/wake times, even on weekends, and how this simple change can dramatically improve our psychological and physiological functioning. Kristen shares her personal experience of how aligning her circadian rhythms has boosted her productivity, focus, and overall health - she hasn't been ill for over eight years. Throughout our conversation, we explore strategies for harmonising our circadian rhythms within the context of modern life. We cover the importance of morning light exposure, the ideal timing for meals, and how to manage factors like alcohol and caffeine consumption. Kristen also provides valuable advice for shift workers on maintaining healthy rhythms despite irregular schedules. This conversation really is packed with actionable insights and I hope that it leaves you feeling empowered to take control of your daily rhythms and experience the transformative effects on your health that can help you tune into your body's natural rhythms and optimise your health.  Support the podcast and enjoy Ad-Free episodes. Try FREE for 7 days on Apple Podcasts https://apple.co/feelbetterlivemore. For other podcast platforms go to https://fblm.supercast.com. Thanks to our
Actionable Insights

1. Prioritize Stable Sleep-Wake Timing

Maintain a consistent sleep-wake timing daily, as stable timing is the most important behavioral experience for optimizing health and longevity, predicting higher psychological functioning and stronger physiological markers.

2. Consistent Wake Time & Morning Light

Wake up at the same time every day and immediately expose yourself to morning sunlight or natural light for at least 5-10 minutes, as this is critical for setting your circadian rhythm and promoting appropriate melatonin secretion.

3. Align Daily Habits with Natural Rhythms

Align daily behaviors like light exposure, meal timing, activity, and sleep-wake times with the natural light-dark cycle to achieve transformative effects on health, energy, and overall longevity.

4. Limit Sleep-Wake Time Variability

Aim to keep your sleep-wake time variability to less than one hour, as exceeding this can lead to a degradation in heart rate variability and an increase in resting heart rate, even in healthy individuals.

5. Minimize Weekend Sleep-Wake Shifts

Maintain consistent sleep-wake times across all seven days of the week, minimizing differences between weekdays and weekends to avoid ‘social jet lag,’ which can have profound negative effects on health and well-being.

6. Avoid Late Night Light Exposure

Avoid viewing light, especially blue light, between 11 PM and 4 AM, as chronic exposure during this time negatively impacts your dopamine system, affecting motivation and reward the following day.

7. Avoid Alcohol for Optimal Recovery

Avoid alcohol consumption, as even two or more drinks can take an average of five days for your physiology to return to baseline, and no amount of alcohol appears to be good for resting physiology and sleep quality.

8. Practice Time-Restricted Eating

Consolidate your eating window to daylight hours, aiming to consume the bulk of your calories when it is still light out, as your body is best primed to metabolize food during this period.

9. Avoid Late Evening Meals

Finish your last meal at least two to three hours before your intended bedtime, as eating late compromises deeper stages of sleep and significantly decreases sleep efficiency.

10. Limit Caffeine to Early Day

Consume your last sip of caffeine by noon, or at the very latest 1 PM, as caffeine after this time can significantly impact sleep onset and delay your ability to fall asleep.

11. Manage Sleep Debt Effectively

Aim to keep your sleep debt under 45 minutes, as individuals who consistently do so are less predisposed to illness and injury, indicating a more robust immune system and overall resilience.

12. Prioritize Hydration

Prioritize staying well-hydrated, especially in dry environments or during demanding work, as dehydration is a significant factor that negatively impacts sleep and recovery.

13. Prioritize Nutrient-Dense Breakfast

Eat a nutrient-dense breakfast early in the day, especially for women, as the morning timeframe is when your body is best optimized to accept and utilize nutrients.

14. Spend 67+ Minutes Outdoors Daily

Aim to spend a minimum of 67 minutes outdoors daily in natural light, as this is considered the minimum effective dose for supporting mental health, mood, and alertness.

15. Reframe Stress as a Challenge

Actively reframe daily stressors as challenges rather than threats, as perceiving stress as challenging leads to better sleep and recovery, while perceiving it as threatening negatively impacts sleep and recovery.

16. Create Physiological Buffer for Stress

Build physiological ‘buffer’ in your system by optimizing nutrition, hydration, sleep-wake timing, light exposure, and social connections, to better tolerate and recover from high-stress periods in life.

17. Disconnect, Reconnect with Nature

Disconnect from your phone and spend time outdoors, looking at nature and connecting with other humans, as this free practice is fundamental for well-being and helps combat disconnection from the natural world.

18. Reflect on Purpose and Values

Take time away from your phone to listen to your thoughts and reflect on who you want to be, identifying the behaviors and values you need to integrate into your life to practice being that person.

19. Expand Peripheral Vision for Calm

Practice expanding your peripheral vision, as this can immediately decrease your heart rate and increase heart rate variability, helping to reduce stress and improve physiological state.

20. Nap Before 1 PM

If you need a nap to compensate for short sleep, aim to take it before 1 PM to avoid impacting your biological sleep at night and to maintain circadian rhythm.

21. Utilize Yoga Nidra for Relaxation

Practice Yoga Nidra, a mind-body scan technique, as an effective alternative to napping or for relaxation, as it can mimic slow-wave sleep and help increase alertness.

22. Night Shift Protocol: Staying on Pattern

To stay on a night shift pattern, consume your largest, nutrient-dense meal upon waking (e.g., 3-4 PM), minimize eating during the night shift, and have a healthy, low-glycemic breakfast at the end of your shift. Immediately after your shift, minimize light exposure (wear sunglasses/hats) and go to sleep as soon as possible for a consolidated 7+ hours, then wake up, exercise, eat, and be active before your next shift.

23. Night Shift Protocol: Transition to Day

To transition from night to day shift, upon returning home (e.g., 7 AM), have a big breakfast, get significant natural light exposure, and avoid caffeine. Around 11 AM-12 PM, take a 90-minute to 3-hour nap to manage sleep pressure without compromising night sleep. After the nap, have a green tea or natural caffeine, do errands, have an early dinner, and then go to bed when naturally sleepy, aiming to wake up the next day at your desired day-shift wake time.

24. Consider Creatine for Sleep Deprivation

Consider creatine supplementation, particularly for individuals in demanding jobs or experiencing sleep deprivation, as recent research suggests it can be protective against the symptoms of sleep deprivation.