Children who stay up late at risk of obesity: study

National Post:

"Children who stay up past their bedtimes may not just be frustrating their parents -- their health may also be in jeopardy, according to new research.

A new U.S. study of nine-to 12-year-olds suggests that children who do not get enough sleep are also at an increased risk of being overweight. Pediatric researchers at the University of Michigan also found children's sleep patterns in the third grade could help predict their subsequent weight.

Those who generally got less than nine hours of sleep were more likely to be overweight in Grade 6, regardless of their weight in Grade 3 and other factors such as race, gender, and class."