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 .
Effects of television viewing reduction on energy intake and expenditure in overweight and obese adults: a randomized controlled trial.
BACKGROUND The average adult watches almost 5 hours of television ( TV ) per day , an amount associated with increased risks for obesity . This trial examines the effects of TV reduction on energy intake ( EI ) , energy expenditure ( EE ) , energy balance , body mass index ( BMI ) , ( calculated as weight in kilograms divided by height in meters squared ) , and sleep in overweight and obese adults . METHODS R and omized controlled trial of 36 adults with a BMI of 25 to 50 who self-reported a minimum of 3 h/d of TV viewing . Participants were enrolled in home-based protocol s from January through July 2008 . After a 3-week observation phase , participants were stratified by BMI and r and omized to an observation-only control group ( n = 16 ) or an intervention group ( n = 20 ) for 3 additional weeks . The intervention consisted of reducing TV viewing by 50 % of each participant 's objective ly measured baseline enforced by an electronic lock-out system . RESULTS Although not statistically significant , both groups reduced their EI ( -125 kcal/d [ 95 % CI , -303 to 52 ] vs -38 [ 95 % CI , -265 to 190 ] ) ( P = .52 ) for intervention and control group participants , respectively , where CI indicates confidence interval . The intervention group significantly increased EE ( 119 kcal/d [ 95 % CI , 23 to 215 ] ) compared with controls ( -95 kcal/d [ 95 % CI , -254 to 65 ] ) ( P = .02 ) . Energy balance was negative in the intervention group between phases ( -244 kcal/d [ 95 % CI , -459 to -30 ] ) but positive in controls ( 57 kcal/d [ 95 % CI , -216 to 330 ] ) ( P = .07 ) . The intervention group showed a greater reduction in BMI ( -0.25 [ 95 % CI , -0.45 to -0.05 ] vs -0.06 [ 95 % CI , -0.43 to 0.31 ] in controls ) ( P = .33 ) . There was no change in sleep . CONCLUSION Reducing TV viewing in our sample produced a statistically significant increase in EE but no apparent change in EI after 3 weeks of intervention . Trial Registration clinical trials.gov Identifier : NCT00622050
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 .