Andrew Huberman· PhD
The timing of your sleep is equally important to the duration of sleep. Figuring out your best sleep-wake timing is critical to maximizing your attention & focus, especially if you have ADHD.
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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 timing of your sleep is equally important to the duration of sleep. Figuring out your best sleep-wake timing is critical to maximizing your attention & focus, especially if you have ADHD.
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great sleep is always going to be an important substrate for attention and focus for anybody but especially for people with ADHD
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.