Andrew Huberman· PhD
The 7–9 hour recommendation comes from an AASM/Sleep Research Society panel that reviewed 5,314 scientific articles across nine health domains (Watson et al., Sleep, 2015).
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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.
The 7–9 hour recommendation comes from an AASM/Sleep Research Society panel that reviewed 5,314 scientific articles across nine health domains (Watson et al., Sleep, 2015).
Every Sunday: the week’s new conflicts and verdict changes — and nothing else.
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.
Would love a "what would change this verdict" RSS feed. Sign me up if it exists.
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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.