Bryan Johnson· Author
Rocking did not improve sleep onset, sleep efficiency, or sleep fragmentation in this population.
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We can't find evidence that holds up here. Proponents are reasoning from mechanism or analogy rather than direct human data, and the most credible skeptics raise objections we can't dismiss.
Rocking did not improve sleep onset, sleep efficiency, or sleep fragmentation in this population.
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Whole-night rocking did not improve sleep and also reduced deep-sleep activity in older adults, suggesting benefits might decline and reverse by age.
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Morning sunlight exposure shifts the cortisol awakening response forward, improving daytime alertness.
Long-term morning sunlight reduces age-related macular degeneration risk.
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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.