What Alexey Guzey thinks about health and fitness
Writer and founder of New Science, an organisation set up to build new institutions for the life sciences. He is best known for a line-by-line audit of the sleep researcher Matthew Walker's bestseller, and for a year of interviews with more than sixty working biologists about how their field actually works. He writes at guzey.com and rewrites himself in public.
Alexey Guzey did not write this page.
We collected these quotes from things they published elsewhere, and every quote links to where it was said. They have no account here and have not endorsed this site. Quotes are word for word; the short line under each one is our own restatement, not their wording. Their own site. Is this you? Claim it or ask us to remove it. Or tell us what is wrong here.
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7 dated positions, 2019 to 2026, in their own words. Our reading of what Alexey Guzey has said — not written or endorsed by them.
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Our reading · no longer heldMost people sleep more than they need to, and are better off deliberately sleeping less.
No longer holdswhile I still believe that the quality of the existing sleep science is extremely low, I advise against trying to decrease the amount of sleep you’re getting based on this article
SaidMy current status is that I just don’t really worry about sleep these days.
- 3 years earlier
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Our reading · no longer heldDaytime sleepiness is a normal state to live with rather than a signal to sleep more, so the right amount of sleep is the least you can sustain.
No longer holdsTherefore, I realized that it’s very important to be as awake as possible and that my model of sleepiness where you can be “awake”, “sleepy” and “asleep” is dumb.
SaidI tried Adderall and it made me more awake than ever before.
↗My 2022 self (I don't know them) was very wrong about meditation, huge monitors, and... sleep.guzey.com 2nd of 2 in this piece
- 12 months earlier
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Their wordsIt appears that the evidence for all of these beliefs is much weaker than sleep scientists and public health experts want us to believe.
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Their wordsExperiencing sleepiness is normal and does not necessarily imply that you are undersleeping.
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Their wordsI claim that if you sleep as much as you want, you’ll probably sleep too much and become more susceptible to depression.
- 2 years earlier
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Their wordsI found that the book consistently overstates the problem of lack of sleep, sometimes egregiously so. It misrepresents basic sleep research and contradicts its own sources.
↗Matthew Walker's "Why We Sleep" Is Riddled with Scientific and Factual Errorsguzey.com 1st of 2 in this piece
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Our readingGetting the science wrong in a bestselling health book does real harm to the people who follow it.
Their wordsWalker’s book has likely wasted thousands of hours of life and worsened the health of people who read it and took its recommendations at face value
↗Matthew Walker's "Why We Sleep" Is Riddled with Scientific and Factual Errorsguzey.com 2nd of 2 in this piece