Among children , these interventions demonstrated reduced screen time , increased physical activity , and improved diet- and weight-related outcomes .
CONTEXT Sedentary time spent with screen media is associated with obesity among children and adults .
Obesity has potentially serious health consequences , such as heart disease and diabetes .
This Community Guide systematic review examined the effectiveness and economic efficiency of behavioral interventions aim ed at reducing recreational ( i.e. , neither school- nor work-related ) sedentary screen time , as measured by screen time , physical activity , diet , and weight-related outcomes .
Use of an open-loop system to increase physical activity.
This study evaluated the effectiveness of an open-loop system that reinforces physical activity with TV watching to increase  children 's physical activity .  Nonoverweight , sedentary boys and girls ( 8 - 12 y ) were r and omized to a group that received feedback of activity counts + reinforcement for physical activity by providing access to television ( F+R , n = 20 ) ; or to feedback , no reinforcement ( Feedback , n = 20 ) or no feedback , no reinforcement control ( Control , n = 21 ) groups . Children wore an  accelerometer with a count display  for 4-months with a 1-year follow-up . F+R reduced TV by 68 min/day and TV time was lower than the Feedback ( p < .005 ) and Control ( p < .002 ) groups . TV time of F+R remained 31 min lower ( p < .02 ) than baseline at 1-year . F+R had a 44 % increase in physical activity , which was greater than the feedback ( p < .04 ) and control ( p < .01 ) groups . An open-loop system decreases TV viewing and increases physical activity of children for 4-months . TV of the F+R group remained lower at 12 months , suggesting a reduction in screen-time habits
Among children , these interventions demonstrated reduced screen time , increased physical activity , and improved diet- and weight-related outcomes .
CONTEXT Sedentary time spent with screen media is associated with obesity among children and adults .
Obesity has potentially serious health consequences , such as heart disease and diabetes .
This Community Guide systematic review examined the effectiveness and economic efficiency of behavioral interventions aim ed at reducing recreational ( i.e. , neither school- nor work-related ) sedentary screen time , as measured by screen time , physical activity , diet , and weight-related outcomes .