← The Peter Attia Drive

#126 – Matthew Walker, Ph.D.: Sleep and immune function, chronotypes, hygiene tips, and addressing questions about his book

Aug 31, 2020 1h 41m 15 insights
<div> <p>In this episode, sleep expert Matthew Walker returns by popular demand to dive deeper into many sleep-related topics, starting with what we've learned about sleep through the lens of the COVID-19 pandemic and how sleep impacts the immune system. He then covers topics such as how dreaming affects emotional health, the different sleep chronotypes, the best sleep hygiene tips, and the pros and cons of napping. Matthew finishes by addressing several of the errors that readers have pointed out in his book, Why We Sleep.</p> </div> <div> <p>We discuss:</p> </div> <div> <ul type="disc"> <li>Three ways the coronavirus pandemic impacts sleep [3:30];</li> <li>The importance of dreaming for emotional health, and how the coronavirus pandemic increases dreaming [11:45];</li> <li>The impact of alcohol consumption on sleep quality and stress levels [20:00];</li> <li>Sleep's impact on the immune system and implications for a future COVID-19 vaccine [27:45];</li> <li>What determines how much deep sleep and REM sleep you need? [36:30];</li> <li>Pros and cons of napping, and insights from the sleep habits of hunter-gatherer tribes [42:15];</li> <li>Sleep hygiene, wind-down routine, and tips for better sleep [56:45];</li> <li>Understanding sleep chronotypes and how knowing yours can help you [1:06:00];</li> <li>Night terrors in kids—what they are and why they happen [1:16:30];</li> <li>Addressing errors found in Matt's book, Why We Sleep [1:20:45]; and</li> <li>More.</li> </ul> </div> <p>Learn more: <a href="https://peterattiamd.com/">https://peterattiamd.com/</a><br /> <br /> Show notes page for this episode: <a href="https://peterattiamd.com/matthewwalker4">https://peterattiamd.com/matthewwalker4</a><br /> <br /> Subscribe to receive exclusive subscriber-only content: <a href="https://peterattiamd.com/subscribe/">https://peterattiamd.com/subscribe/</a><br /> <br /> Sign up to receive Peter's email newsletter: <a href="https://peterattiamd.com/newsletter/">https://peterattiamd.com/newsletter/</a><br /> <br /> Connect with Peter on <a href="http://Facebook.com/PeterAttiaMD"><u>Faceboo</u></a><u>k</u> | <a href="http://Twitter.com/PeterAttiaMD"><u>Twitter</u></a> | <a href="http://Instagram.com/PeterAttiaMD"><u>Instagram</u></a>.</p>
Actionable Insights

1. Prioritize Sleep Before Vaccination

Ensure you get sufficient sleep in the week leading up to any vaccination (e.g., flu shot), as insufficient sleep can significantly reduce the antibody response, making the vaccine less effective. This principle may apply to future COVID-19 vaccinations as well.

2. Avoid Alcohol for Better Sleep

Minimize or avoid alcohol consumption, especially in the evenings, as it acts as a sedative that fragments sleep, stimulates the fight-or-flight system, and significantly decreases beneficial REM sleep. REM sleep is crucial for emotional processing and reducing anxiety.

3. Establish Regular Sleep Schedule

Go to bed and wake up at the same time every day, including weekends, to maintain a consistent circadian rhythm. This reduces ‘social jet lag’ and helps your body anticipate sleep, improving overall sleep quality and duration.

4. Create a Wind-Down Routine

Dedicate 15-30 minutes before bed to a relaxing routine, such as light stretches or meditation, and put away all electronic devices. Sleep is a gradual process, like landing a plane, and requires time to transition from wakefulness to stable sleep.

5. Optimize Bedroom Environment

Ensure your bedroom is dark and cool, as a lower body temperature is necessary for initiating sleep; it’s easier to sleep in a room that’s too cold than too hot. Remove all clock faces to prevent anxiety from checking the time if you’re awake.

6. Manage Naps Strategically

If you struggle with falling or staying asleep at night, avoid daytime naps to build up sufficient ‘sleep pressure’ (adenosine). However, if you sleep well at night, short naps can offer cognitive and cardiovascular benefits.

7. Get Morning Daylight Exposure

Expose yourself to daylight during the first half of the day. This is just as important as darkness at night for regulating your circadian rhythm and signaling to your brain that it’s time to be awake and alert.

8. Avoid Staying Awake in Bed

If you find yourself awake in bed for more than 20 minutes, get up and do something else until you feel sleepy again, then return to bed. This prevents your brain from forming a learned association between your bed and wakefulness/anxiety.

9. Keep Technology Out of Bedroom

Keep all electronic devices outside the bedroom to avoid ‘sleep procrastination’ and the flood of anxiety that comes from checking them. This also prevents anticipatory anxiety about waking up to information overload.

10. Delay Morning Phone Check

Avoid checking your phone immediately upon waking; instead, wait at least an hour. This prevents a ‘jag of anticipatory anxiety’ that can lighten your sleep throughout the night and sets a more positive tone for your day.

11. Understand Your Sleep Chronotype

Determine if you are a morning, evening, or intermediate type using the MEQ test (Morningness-Eveningness Questionnaire). Knowing your innate chronotype can help you align your schedule with your biology, reduce self-blame, and explain struggles with conventional work/school times.

12. Address Sleep Disorders First

If you suspect you have a sleep disorder like insomnia or sleep apnea, consult a doctor for diagnosis and intervention. Sleep hygiene tips alone will not be effective if an underlying medical condition is impairing your sleep.

13. Prevent Child Exhaustion for Terrors

For parents of children experiencing night terrors, ensure the child is well-rested and avoid situations that lead to exhaustion. Increased deep non-REM sleep due to extended wakefulness or missed naps can increase the likelihood of night terrors.

14. Seek Pediatric Sleep Expertise

For specific questions or issues regarding infant or child sleep, consult experts like Dr. Craig Canapari (Yale Medical School) or Dr. Jodi Mindell, who are leading authorities in pediatric sleep research and clinical practice.

15. Implement Incremental Habit Changes

When adopting new sleep habits, start with small, manageable goals and gradually increase the duration or intensity. This approach, inspired by behavioral change research, sets you up for success rather than failure.