The Power of the Sleep Cycle
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.
1.5 hours
3 hours
4.5 hours
6 hours
7.5 hours
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