|
|
|
|
|
|
by ianai
1989 days ago
|
|
|
People sleep in cycles. Everyone’s timing of a cycle is different. But the average is around 90 minutes. You’ll feel dramatically better keeping your sleep to obey the boundaries of those 90 minute cycles. Also REM occurs in the last cycles of sleep. So sleeping 4 hours with little REM and sleeping 6.5 hours with REM is like night and day. |
|
|