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In the US, more than one-third of children and adolescents are overweight or obese. Physical inactivity, and particularly watching TV, which exposes children to junk-food commercials and presents a prime opportunity for unhealthy snacking, is known to increase this risk.
Nearly 20 years ago, a study by researchers at Johns Hopkins University School of Medicine, along with experts at the US Centers for Disease Control and Prevention (CDC) and the National Institutes of Health, concluded that a child’s weight increases with the number of hours he or she spends watching television each day.
This isn’t entirely surprising, but a new study presented at the Pediatric Academic Societies’ (PAS) annual meeting in San Diego in April 2015 revealed a finding that is… watching just one hour of TV a day may be enough to lead to an unhealthy weight.
One Hour of TV a Day Linked to Overweight and Obesity
Using data from more than 11,000 children, researchers from the University of Virginia found kindergartners and first graders who watched just one hour of TV daily were more likely to be overweight or obese than children who watched less.1
The association was strong, with one hour of daily TV linked to a 60 percent greater risk of becoming overweight and a 73 percent greater likelihood of obesity. Computer use was not associated with higher weight, perhaps because, despite being a sedentary activity, it doesn’t expose children to as many junk-food advertisements and is less conducive to snacking.