Polyphasic · Uberman
Uberman
Six 20-minute naps every 4 hours. Not supported by long-term research; reports of severe sleep debt.
Schedule
| Block | Start | Duration |
|---|---|---|
| Nap | 02:00 | 20 min |
| Nap | 06:00 | 20 min |
| Nap | 10:00 | 20 min |
| Nap | 14:00 | 20 min |
| Nap | 18:00 | 20 min |
| Nap | 22:00 | 20 min |
Honest assessment
Uberman is an extreme schedule with 2 hours of total daily sleep. There is no peer-reviewed evidence of long-term sustainability. Sleep deprivation at this level consistently impairs immune function, glucose metabolism, and cognition. Almost everyone who attempts it stops within weeks. Interesting to read about; not recommended to attempt.
Source: Van Dongen et al., Sleep 2003