每天不少于7小时, 最好 around 8小时, 要有质量.

来源: 于 2012-08-30 15:19:38 [旧帖] [给我悄悄话] 本文已被阅读：次

 

Non-REM (NREM) sleep consists of four stages of sleep, each deeper than the last.

REM (Rapid Eye Movement) sleep is when you do most active dreaming. Your eyes actually move back and forth during this stage, which is why it is called Rapid Eye Movement sleep