How many hour should u sleep...
There's no normal number of hours that quantifies a good sleep, just like there's no normal shoe size. Most adults need seven to nine hours a night; others manage just fine with six. It's even possible to get too much sleep, since spending excess time in bed can be a sign of another health problem, such as depression or chronic fatigue syndrome.
Insufficient sleep also raises your risk for obesity, diabetes, depression, alcoholism, and automobile accidents. Plus, a 2007 University of California-Berkeley study confirmed the obvious: Sleep deprivation directly affects areas of the brain that deal with mood and concentration, leaving tired people grumpy, overly emotional, and unable to focus.
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