Every extra hour a third grader spends in bed--regardless of their size--slims the chance of a child being obese as a sixth grader.
To keep trim, third graders should get 9 hours and 45 minutes of sleep a night, according to researchers of a recent study.
Researchers are unable to explain exactly why sleep keeps little waistlines from expanding. But hunger hormones may be to blame.
BTW, have you checked out 60 Second Science the latest blog from the Scientific American?