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SleepHacking6 min readFebruary 15, 2025

Polyphasic Sleep is Dead: Why "Sleep Density" is the New Meta

Trying to sleep 2 hours a day is a recipe for disaster. The new biohacking meta is "Sleep Density"—getting 8 hours of recovery in 6 hours.

Stop Trying to Be Uberman

The "Uberman" polyphasic schedule was a viral trend that ruined many people's health. The human brain requires sustained cycles to clear amyloid plaque (waste products).

Enter: Sleep Density

Sleep Density = (Time Asleep / Time in Bed) × 100

Most efficient sleepers have a density of 90%+. Insomniacs are often below 70%. The goal isn't to sleep less, it's to waste less time lying awake or in light, junk sleep.

Low Density (70%) 8 hours in bed, 5.6 hours asleep. Waking up tired.
High Density (95%) 7 hours in bed, 6.6 hours asleep. Waking up energized.

The Compression Algorithm

SleepHack acts as a compression algorithm for your sleep. By reducing the time it takes to fall asleep (latency) and smoothing over micro-wakeups with sound, it maximizes your density score.


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