Sign up to receive Peter's email newsletter: https://bit.ly/4c602k2 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. We discuss: Show notes page: https://peterattiamd.com/matthewwalker4/ About: The Peter Attia Drive is a weekly, ultra-deep-dive podcast focusing on maximizing health, longevity, critical thinking…and a few other things. With over 30 million episodes downloaded, it features topics including fasting, ketosis, Alzheimer’s disease, cancer, mental health, and much more. Peter is a physician focusing on the applied science of longevity. His practice deals extensively with nutritional interventions, exercise physiology, sleep physiology, emotional and mental health, and pharmacology to increase lifespan (delay the onset of chronic disease), while simultaneously improving healthspan (quality of life). Learn more: https://peterattiamd.com/ Subscribe to receive exclusive subscriber-only content: https://peterattiamd.com/subscribe/ Sign up to receive Peter's email newsletter: https://peterattiamd.com/newsletter/ Connect with Peter on: Facebook: http://bit.ly/PeterAttiaMDFB Twitter: http://bit.ly/PeterAttiaMDTW Instagram: http://bit.ly/PeterAttiaMDIG Subscribe to The Drive: Apple Podcast: http://bit.ly/TheDriveApplePodcasts Overcast: http://bit.ly/TheDriveOvercast Spotify: http://bit.ly/TheDriveSpotify Google Play: http://bit.ly/TheDriveGooglePlay