Bryan Johnson· Author
sleep timing and sleep architecture didn't return to baseline even after 15 days.
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The headline is broadly defensible, but the qualifications matter. Effect sizes vary by population, the strongest claims rest on shorter trials, and credible voices push back on how it's typically framed.
sleep timing and sleep architecture didn't return to baseline even after 15 days.
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it takes more than 15 days for sleep architecture to renormalize from travel
Sleep duration returned to within ~12 minutes of baseline after 2 days. In contrast, changes in sleep timing and sleep architecture were slower to recover and did not return to baseline even after 15 days.
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