Andrew Huberman· PhD
getting a really good night's sleep on a consistent basis is critically important
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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.
getting a really good night's sleep on a consistent basis is critically important
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I'm guessing that very few of you out there are consistently getting seven to nine hours of really terrific sleep, waking up feeling rested and like you're ready to attack the day, and being able to go through the day feeling focused and alert without dips in energy or focus
But the idea is to get most nights, a similar amount, probably seven to nine hours, somewhere in there, of high quality sleep.
10 minutes of bright outdoor light within the first hour of waking anchors the circadian phase and improves sleep onset that night.
Morning sunlight exposure shifts the cortisol awakening response forward, improving daytime alertness.
Long-term morning sunlight reduces age-related macular degeneration risk.
Sleep regularity predicts all-cause mortality more strongly than sleep duration.
Tracking deep sleep on a wearable accurately reflects EEG-measured slow-wave sleep.
Caffeine has a half-life long enough that consumption after 2pm measurably degrades deep sleep in slow metabolizers.