Bryan Johnson· Author
Almost half of these diseases were associated with irregular sleep. Things like inconsistent bed times, late sleep hours, and disrupted circadian rhythms.
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The evidence is convergent. Multiple independent sources reach the same conclusion, the underlying mechanism is well-characterized, and even the field's most cautious voices treat it as worth doing.
Almost half of these diseases were associated with irregular sleep. Things like inconsistent bed times, late sleep hours, and disrupted circadian rhythms.
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It turned out that irregular sleep was just as bad as insufficient sleep for their health and disease risk.
Irregular sleep is just as bad as getting less sleep. Both are linked to the risk of 172 diseases.
42 showed more than doubled risk with bad sleep.
Both were linked to the risk of 172 diseases. But nearly half of these diseases were specifically tied to irregular sleep.
Both are critical for preventing diseases linked to insufficient and irregular sleep.
10 minutes of bright outdoor light within the first hour of waking anchors the circadian phase and improves sleep onset that night.
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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.