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The Matt Walker Podcast

Dr. Matt Walker
The Matt Walker Podcast
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  • #110 - The Science Behind Wearable Sleep Monitoring
    In this user's guide to sleep trackers, learn the science behind how they work using motion and optical sensors as Matt explains the key metrics of Sensitivity, Specificity, and Accuracy. Revealing why most trackers overestimate sleep by failing to detect wakefulness, he reveals the crucial difference between a device's flawed "absolute accuracy" and its more valuable "relative accuracy," which highlights the importance of tracking long-term trends over single-night scores.Matt goes on to examine peer-reviewed data on the Oura Ring, Apple Watch, and Whoop, and introduces the highly accurate, FDA-cleared Happy Ring with its personalized algorithm. Beyond the specs, learn why consistency and form factor are more important than chasing perfect accuracy. The episode also covers the pitfalls of tracking, from the anxiety of "Orthosomnia" to demographic biases in sensor tech, providing a complete guide to choosing and using your device effectively.Please note that Matt is not a medical doctor, and none of the content in this podcast should be considered medical advice in any way, shape, or form, nor prescriptive in any way.Podcast partner, AG1, is one that Matt relies upon for his foundational nutrition. Their new science-backed Next Gen formula features upgraded probiotics, vitamins, and minerals. Start your subscription today to get a FREE bottle of Vitamin D3+K2 and 5 free travel packs with your first order at drinkag1.com/mattwalker.Another sponsor, Shopify, made launching Matt's merchandise incredibly smooth with its integrated sales system. Shopify simplifies everything from online stores to in-person sales. Start your exclusive trial and see for yourself at shopify.com/mattwalker.In a supplement industry where trust is critical, Matt uses podcast partner Puori. Their protein powders are free from hormones, GMOs, and pesticides, with every single batch third-party tested for over 200 contaminants. For protein you can trust, save 20% at puori.com/mattwalker.As always, if you have thoughts or feedback you’d like to share, please reach out to Matt:Matt: Instagram @drmattwalker, X @sleepdiplomat, YouTube: https://www.youtube.com/channel/UCA3FB1fOtY4Vd8yqLaUvolg
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  • #109 - How to Get More REM Sleep
    Matt takes a deep dive into REM sleep this week, highlighting methods to enhance this vital stage for emotional regulation and creativity. Detailing pharmacological approaches, he focuses on the neurotransmitter acetylcholine and how medications like donepezil and modern DORAs can boost REM sleep, while also identifying common suppressors like alcohol and THC. Throughout the episode, he also emphasizes that the goal is not to maximize one stage but to achieve a balanced sleep architecture.The discussion then covers behavioral and lifestyle strategies, explaining how simple changes like sleeping later into the morning, regular exercise, and stress management can remove natural roadblocks to REM. Matt also outlines how managing light exposure - by avoiding blue light at night and getting bright light in the morning - and consuming complex carbohydrates in the evening can further support this dream stage. Finally, the episode touches on emerging technologies like electrical brain stimulation that aim to amplify the brain's natural REM rhythms.Please note that Matt is not a medical doctor, and none of the content in this podcast should be considered medical advice in any way, shape, or form, nor prescriptive in any way.One of this week's sponsors, LMNT, offers a science-based electrolyte drink with no sugar or artificial ingredients. Try their new limited-time Lemonade Salt flavor, available May 20th! Get eight free sample packs with any order at drinklmnt.com/mattwalker. Stock up on this summer flavor while it lasts!Another sponsor, Shopify, made launching Matt's merchandise incredibly smooth with its integrated sales system. Shopify simplifies everything from online stores to in-person sales. Start your exclusive trial and see for yourself at shopify.com/mattwalker.Our third sponsor this week, David, is a revolutionary new protein bar developed with Dr. Peter Attia. It boasts an unbeatable ratio: 28g of protein and 0g of sugar in just 150 calories. Incredibly satiating with six amazing flavors, it’s perfect for muscle health. Visit davidprotein.com/mattwalker and buy 4 cartons to get a 5th FREE!As always, if you have thoughts or feedback you’d like to share, please reach out:Matt: Instagram @drmattwalker, X @sleepdiplomat, YouTube https://www.youtube.com/@sleepdiplomatmattwalker9299
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  • Cozy Cabin Retreat: A Sleep Story Read by Matt Walker
    In this soothing episode, Matt guides you on your personal sleep story towards deep, restorative rest. He invites you to find comfort and release the day's worries through intentional breathing, transporting you to a cozy, imagined haven bathed in soft lights and calming aromas. As twilight descends, experience the tranquil silence and the moon's gentle glow, replacing any turmoil with profound inner peace.A powerful visualization encourages you to shed thoughts and concerns, picturing them as leaves floating away on a serene river. This practice cultivates gratitude and prepares you to let go completely. Trust that tomorrow brings new joys, and allow yourself to drift effortlessly into sleep, waking up truly refreshed and restored.Craving more energy, better metabolism, and immunity? Discover Pique's Nandaka, a ceremonial cacao superfood blend for calm, sustained energy without the crash. Thanks to this wonderful podcast partner, you can now get 20% off for life at pique.com/mattwalker using code MattWalker.As always, if you have thoughts or feedback you’d like to share, please reach out to Matt or Eti:Matt: Instagram @drmattwalker, X @sleepdiplomat, YouTube https://www.youtube.com/@sleepdiplomatmattwalker9299
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  • #108 Implanting False Memories Into Your Brain
    In this week’s episode, Matt Walker explores memory's astonishing malleability, challenging the belief that recollections are fixed. He highlights Loftus's car crash study, showing how subtle language altered speed memories and implanted false details, and reviews the "Lost in the Mall" experiment which proved fabricated autobiographical memories can be instilled. Matt also notes that neuroimaging reveals false and true memory patterns in the hippocampus are remarkably similar, underscoring memory's deceptive, fluid nature, rather than a factual archive.Our host goes on to discuss groundbreaking research like optogenetics from Tonegawa's lab, demonstrating manipulation to implant false fear memories at a cellular level. This underpins "memory reconsolidation" by Karim Nader, showing retrieved memories enter a "labile window" for modification. This opens profound avenues for therapies: Image Rehearsal Therapy for nightmares and propranolol for PTSD effectively weaken emotional trauma. The episode concludes by suggesting identity, objective truth, and forgiveness are dynamic, neurologically modifiable constructs, not static realities.Please note that Matt is not a medical doctor, and none of the content in this podcast should be considered medical advice in any way, shape, or form, nor prescriptive in any way.Podcast partner and sponsor, Shopify, made launching Matt's merchandise incredibly smooth with its integrated sales system. Shopify simplifies everything from online stores to in-person sales. Start your exclusive trial and see for yourself at shopify.com/mattwalker.As always, if you have thoughts or feedback you’d like to share, please reach out to Matt:Matt: Instagram @drmattwalker, X @sleepdiplomat, YouTube: https://www.youtube.com/channel/UCA3FB1fOtY4Vd8yqLaUvolg
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  • #107 - Medicine 3.0 with Dr. Avinish Reddy
    Founder & CEO of Elevated Medical, Dr. Avinish Reddy, joins Matt today on this very special episode to discuss a comprehensive approach to longevity. One core theme presented is the profound interconnectedness of physical, mental, and cognitive well-being, essential for true health optimization. Dr. Reddy emphasizes the striking impact of social connection: isolation can increase early death risk by 50%, comparable to smoking. He believes fostering strong social bonds is a fundamental pillar of healthcare, akin to sleep's importance.The discussion highlights advanced diagnostics and actionable lifestyle strategies. Dr. Reddy advocates for precise cardiovascular risk assessment (apoB) and early metabolic dysfunction detection (fasting insulin/OGTT), with imaging (CT/CIMT) that visualizes arterial health proactively. As you will hear, prevention must begin decades before major health events, utilizing personalized data, and lifestyle is paramount - consistent movement, balanced nutrition, quality sleep, and stress management are vital for reversing conditions and fostering resilience.Please note that Matt is not a medical doctor, and none of the content in this podcast should be considered medical advice in any way, shape, or form, nor prescriptive in any way.As a huge supporter of mission-driven companies, Matt recommends new partner Branch Basics. Their plant- and mineral-based ‘The Concentrate’ is tough on kitchen grease yet gentle enough for baby toys, helping you create a toxin-free home. Get 15% off with code MattWalker at branchbasics.com/mattwalker.Craving more energy, better metabolism, and immunity? Discover Pique's Nandaka, a ceremonial cacao superfood blend for calm, sustained energy without the crash. Thanks to this wonderful podcast partner, you can now get 20% off for life at pique.com/mattwalker using code MattWalker.In a supplement industry where trust is critical, Matt uses podcast supporter Puori. Their protein powders are free from hormones, GMOs, and pesticides, with every single batch third-party tested for over 200 contaminants. For protein you can trust, save 20% at puori.com/mattwalker.As always, if you have thoughts or feedback you’d like to share, please reach out to Matt:Matt: Instagram @drmattwalker, X @sleepdiplomat, YouTube: https://www.youtube.com/channel/UCA3FB1fOtY4Vd8yqLaUvolgConnect with Dr. Avinish Reddy:Elevated Medical: https://elevatedmedical.com/LinkedIn: https://www.linkedin.com/in/avinishreddy/Instagram: https://www.instagram.com/avinishreddymd/
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Sobre The Matt Walker Podcast

The Matt Walker Podcast is all about sleep, the brain, and the body. Matt is a Professor of Neuroscience at the University of California, Berkeley. He is the author of the book, Why We Sleep and has given a few TED talks. Matt is an awkward British nerd who adores science and the communication of science to the public.
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