Skip to content

    Children's Health

    Font Size

    Can Your Child's Sleep Habits Make Him Gain Weight?

    New research shows that a lack of sleep in childhood can contribute to obesity later on.
    By Christina Boufis
    WebMD Magazine - Feature

    You've probably heard that increased TV watching, high-calorie snacking, and decreased physical activity are linked to skyrocketing rates of child obesity. But recent research points to a new culprit: lack of sleep.

    "Children who don't sleep enough are at much greater risk for obesity than children who do sleep enough," says Frederick J. Zimmerman, PhD, chair and professor in the Department of Health Services at UCLA School of Public Health, and one of the lead researchers in a recent study.

    Recommended Related to Children

    Craniosynostosis, Primary

    Important It is possible that the main title of the report Craniosynostosis, Primary is not the name you expected. Please check the synonyms listing to find the alternate name(s) and disorder subdivision(s) covered by this report.

    Read the Craniosynostosis, Primary article > >

    The study followed 1,930 children, ages 0 months to 13 years, tracking their sleep and weight patterns for five years. What they found: Children 0 to 4 years at the start of the study "who had inadequate nighttime sleep had about an 80% higher risk of obesity five years later. This is a big, meaningful difference," Zimmerman says. "If you took a group of 100 kids who were not sleeping well, about 25 or so would wind up obese who otherwise wouldn't be," Zimmerman says.

    The Link Between Sleep and Obesity

    That's why researchers say "there is a critical window prior to age 5," when inadequate nighttime sleep can set the stage for childhood obesity for years to come. The difference between those who got enough sleep and those who didn't? About 45 minutes, Zimmerman estimates.

    The study didn't explore causal mechanisms behind inadequate sleep and weight gain, though Zimmerman suspects several factors. "Younger kids, even kids who are 6 and 8 years old, who are under-slept are uncomfortable," says Zimmerman. And they might try to feel better by eating.

    Also, hormones involved in regulating appetite, leptin and gherlin, are thrown off-kilter by inadequate sleep in adults, and the same might happen in children.

    Finally, there's the possibility that kids who are really tired just aren't able or don't want to do a lot of physical activity. Clearly, more research is needed in all these areas.

    One surprising result of the study: Napping did not reduce the risk of obesity.

    The bottom line? "Getting adequate [nighttime] sleep is one of the easiest ways to reduce the risk of obesity," Zimmerman says.

    Today on WebMD

    child with red rash on cheeks
    What’s that rash?
    plate of fruit and veggies
    How healthy is your child’s diet?
    smiling baby
    Treating diarrhea, fever and more.
    Middle school band practice
    Understanding your child’s changing body.

    worried kid
    jennifer aniston
    Measles virus
    sick child

    Child with adhd
    rl with friends
    Child Coughing or Sneezing into Elbow