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I’ve long advocated that 7.5 or 9 hours is the perfect number of hours to sleep, give or take a few minutes depending on your REM cycles. Plus, this formula doesn’t account for the time it takes to fall asleep.
I discussed sleep in How To Increase Natural Testosterone.
If you are living on 4.5 or 6 hours of sleep, see the chart below.
See the articles on REM sleep here: REM Sleep 2011, REM Sleep 2009, and REM Sleep 2007.
Sleep or Die
Click here for a larger view of the image (i.e. the original source).
Jimson Lee
Coach & Founder at SpeedEndurance.com
I am a Masters Athlete and Coach currently based in London UK. My other projects include the Bud Winter Foundation, writer for the IAAF New Studies in Athletics Journal (NSA) and a member of the Track & Field Writers of America.
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