And what is a cramp, exactly? We know when we get one and what they feel like, but do we actually know what is happening and why? How do we prevent a cramp? And why do they hurt so much?
Article from NYTimes.com By JANE E. BRODY Think you do just fine on five or six hours of shut-eye? Chances are, you are among the many millions who unwittingly shortchange themselves on sleep. Research shows that most people require seven or eight hours of sleep to function optimally. Failing to get enough sleep night after night […]