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The Matt Walker PodcastAuthor: Dr. Matt Walker
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. Want to sleep better alongside others doing the same? Come join my Art of Sleep community: skool.com/art-of-sleep Language: en-us Genres: Health & Fitness, Medicine, Science, Social Sciences Contact email: Get it Feed URL: Get it iTunes ID: Get it Trailer: |
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#154 - Sleep and Cortisol
Monday, 5 October, 2026
Delving into the science of cortisol, Matt debunks its social media reputation as a toxic villain. He explains how this essential hormone actually regulates metabolism, immunity, and survival. He also unpacks the healthy "Cortisol Awakening Response" that prepares us for the day and dispels the popular internet myth that a 3:00 a.m. cortisol spike is what wakes you up at night.Matt contrasts healthy, temporary cortisol spikes - like those from exercise - with the chronic stress that causes actual damage. Highlighting how sleep loss dangerously flattens our daily cortisol curve, he shares five tips for a healthier rhythm: get morning light, prioritize sleep, exercise regularly, skip useless single-sample hormone tests, and ignore normal nighttime awakenings. Ultimately, cortisol is innocent; timing is the true culprit.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.Hydrate scientifically with LMNT, a sugar-free electrolyte mix backed by physiology and biochemistry. Try the permanent Lemonade Salt flavor for a balanced, clean boost without the sugar crash. Use Matt’s link to get a free 8-count sample pack with any purchase: drinklmnt.com/mattwalker.Matt trusts Cozy Earth for cooler, deeper rest. Their ultra-soft, temperature-regulating sheets wick away moisture and include a 100-night trial plus a 10-year warranty. Listeners can head to cozyearth.com and use code MATTWALKER for up to 20% off home and sleepwear. 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/@sleepdiplomat
