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 .
Open-loop feedback increases physical activity of youth.
PURPOSE The number of youth that meet activity guidelines is decreasing and easy access to reinforcing sedentary behaviors competes with increasing physical activity . In the laboratory , open-loop feedback that used pedometer activity counts to gain access to sedentary alternatives doubled physical activity . This study evaluated the influence of open-loop feedback and reinforcement on physical activity and television ( TV ) time in a small clinical trial . METHODS Children ( 8 - 12 yr old ) were r and omized to an open-loop feedback plus reinforcement intervention ( N = 11 ) or no feedback , no reinforcement control ( N = 7 ) . Subjects wore an accelerometer for 6 wk and attended meetings to download the accelerometer . Accumulating physical activity counts gave subjects in the open-loop group access to  TV time , controlled by a TV Allowance device , with 400 counts = 1 h of TV . The control group had no feedback for activity and free access to TV . RESULTS The open-loop group had a 24 % increase in physical activity , which was greater ( P = 0.02 ) than the control group . TV time of the open-loop group was reduced by 18 % or 20 min x d(-1 ) whereas the control group increased by 13 min x d(-1 ) , but these were not significant changes . The change in time spent watching television was directly related to the change in BMI z-score ( r = 0.69 , P = 0.002 ) . CONCLUSION Open-loop feedback increases physical activity in children , thus helping children to achieve physical activity recommendations . Reductions in TV watching may reduce or minimize gains in body weight
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 .