
Sleep Cycles
Get flash to fully experience Pearltrees
How to Reboot Your Sleep Cycle and Get the Rest You Deserve
Nothing can stand in for a good night's sleep.The Power of the Sleep Cycle « Glen Rhodes
Ok, I’ve been talking to people for a long time about the fact that you can get by on 6 or even 4.5 hours of sleep per day without question. The secret is NOT the amount of sleep, but rather the number itself; a multiple of 90 minutes will change your life.Understanding Sleep: Deep Sleep, REM Sleep, Cycles, Stages, and
I had a Psychology teacher back at New College (who's now apparently an expert in the Klingon language ) , who used to talk about how the human body had these ±90-minute cycles. And that if you could become aware of yours, you could do Great Things -- particularly because you could learn the optimal time to snag a nap versus, say, try to cure small-cell carcinoma. Not sure if this is exactly what he was talking about, but I am certainly fascinated by the idea of ultradian rhythms :

