Sleep
Sleep Pressure Homeostat
The sleep pressure homeostat is the accumulating drive to sleep while awake that caffeine and naps temporarily shift. Consistent wake times and light anchor the rhythm.
The sleep pressure homeostat (Process S) is the rising drive to sleep that accumulates while you are awake—adenosine-linked in research—and dissipates during sleep. Caffeine blocks receptors temporarily; naps or late sleep-ins reduce evening pressure.
Align wake time and light exposure to reset the curve daily.
Common questions
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Do naps reduce sleep pressure?
Yes—short early-afternoon naps can refresh you but long late naps steal pressure needed for night sleep. Keep naps under 25 minutes before 3 p.m. if insomnia strikes.
Related terms
Put Sleep Pressure Homeostat into practice
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