Andrew Huberman· PhD
I like to make the bed really cool at the beginning of the night even colder in the middle of the night and warm as I wake up
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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.
I like to make the bed really cool at the beginning of the night even colder in the middle of the night and warm as I wake up
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Native comments, Twitter mentions, and Reddit threads about this claim — surfaced together so the conversation isn't fragmented across platforms.
Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.
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I like to make the bed really cool at the beginning of the night, even colder in the middle of the night, and warm as I wake up.
And I'm getting close to two and a half hours of REM sleep now. And I only sleep about six and a half, seven hours to feel rested. So, it's pretty spectacular.
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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.