E Ontario Now

Boston – More sleep can reduce a child’s risk of becoming obese, according to a new study from the University of Michigan.

Researchers found that for every additional hour of sleep for a night for a third-grader, the risk of obesity is reduced by 40 percent by 6th grade.

“Many children aren’t getting enough sleep, and that lack of sleep may not only be making them moody or preventing them from being alert and ready to learn at school, it may also be leading to a higher risk of being overweight,” says study lead author Julie C. Lumeng, M.D., assistant research scientist at the U-M Center for Human Growth and Development.

“This study suggests that an increased risk for overweight is yet another potential consequence of short sleep duration, providing an additional reason to ensure that children are receiving adequate sleep, primarily through enforcing an age-appropriate bed time.”

Most promising, these study results show that for every additional hour of sleep in sixth grade, a child was 20 percent less likely to be overweight in sixth grade; every additional hour of sleep in third grade resulted in a 40 percent decrease in the child’s risk of being overweight in sixth grade.

“Sleep may have a behavior impact on children,” says Lumeng. “In other words, children who are better rested may have more energy to get more exercise. For example, they may be more likely to go out and play, as opposed to lying on the couch watching TV. It also is possible that when children are tired, they may be more irritable or moody, and may use food to regulate their mood.”

The study is published in the journal Pediatrics.