![]() ![]() Some of these successful TV-reduction trials have been delivered through the schools: The Planet Health trial, for example, used middle school classroom lessons to encourage less TV viewing, more activity, and improvements in diet compared to the control group, students assigned to receive the lessons cut back on their TV time, and had lower rates of obesity in girls. ![]() ![]() Task Force on Community Preventive Services recommends that communities roll out behavior-change programs aimed at curbing screen time, since there’s “sufficient evidence” that such programs do help reduce screen time and improve weight. ( 15– 18) Based on this evidence, the U.S. Several trials designed to reduce children’s TV use have found improvements in body mass index (BMI), body fat, and other obesity-related measures. ( 11, 12) And there’s evidence that early TV habits may have long-lasting effects: Two studies that followed children from birth found that TV viewing in childhood predicts obesity risk well into adulthood and mid-life. ( 6– 10) Children who have TV sets in their bedrooms are also more likely to gain excess weight than children who don’t. ![]() Studies that follow children over long periods of time have consistently found that the more TV children watch, the more likely they are to gain excess weight. This article briefly outlines the research on how TV viewing and other sedentary activities contribute to obesity risk, and why reducing screen time and sedentary time are important targets for obesity prevention. And there’s good evidence that cutting back on TV time can help with weight control-part of the reason why many organizations recommend that children and teens limit TV/media time to no more than two hours per day. ( 5) Since then, extensive research has confirmed the link between TV viewing and obesity in children and adults, in countries around the world. Research conducted at Harvard first linked TV watching to obesity more than 25 years ago. ![]()
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