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From Polyphasic Sleep Wiki
300 bytes added
, 3 years ago
Currently, the standard variant is recommended to have a core sleep of 3h20m and 1h40m respectively. The cycle length being a multiple of 100m instead of 90m is meant to accommodate either longer sleep cycles, or extra [[wikipedia:Rapid_eye_movement_sleep|REM]] at the start or the end of the sleeps.