There is a large body of evidence from all study design s which suggests that decreasing any type of sedentary time is associated with lower health risk in youth aged 5 - 17 years .
In particular , the evidence suggests that daily TV viewing in excess of 2 hours is associated with reduced physical and psychosocial health , and that lowering sedentary time leads to reductions in BMI
Accumulating evidence suggests that , independent of physical activity levels , sedentary behaviours are associated with increased risk of cardio-metabolic disease , all-cause mortality , and a variety of physiological and psychological problems .
Therefore , the purpose of this systematic review is to determine the relationship between sedentary behaviour and health indicators in school-aged children and youth aged 5 - 17 years .
Relation between socioeconomic status and body mass index: evidence of an indirect path via television use.
OBJECTIVE To test the hypothesis that media use mediates the relation between socioeconomic status ( SES ) and body mass index ( BMI ) . DESIGN Analysis of 2 large cross-sectional surveys , 1 from Germany and 1 from the United States . SETTING Twenty-seven public schools in northern Germany ; telephone interviews in the United States . PARTICIPANTS A total of 4810 German children and adolescents aged 10 to 17 years ( mean age , 12.8 years ) ; 4473 US children and adolescents aged 12 to 16 years ( mean age , 14.0 years ) recruited using r and om-digit-dial methods . Main Exposures  Media exposure  was assessed via survey questions about the presence of a television in the bedroom , television screen time , computer and video game screen time , and movie viewing .  The SES was derived from type of school ( German sample ) or parental reports of their own education and family income ( US sample ) . MAIN OUTCOME MEASURES The BMI was assessed by the use of self-reports in both sample s , supplemented by parental reports ( US sample ) for height and weight . RESULTS In both sample s , SES was inversely associated with BMI , and media use was directly associated with BMI . The effect of SES on overweight was partially mediated by media exposure , which explained 35 % of the SES- BMI association in the German sample and 16 % in the US sample . In both groups , television in the bedroom and television screen time had statistically significant indirect paths , whereas video game use and movie viewing did not . CONCLUSIONS Students from low-SES background s are at higher risk for overweight in part because of higher levels of television viewing . The change of media use habits could modify this health disparity
There is a large body of evidence from all study design s which suggests that decreasing any type of sedentary time is associated with lower health risk in youth aged 5 - 17 years .
In particular , the evidence suggests that daily TV viewing in excess of 2 hours is associated with reduced physical and psychosocial health , and that lowering sedentary time leads to reductions in BMI
Accumulating evidence suggests that , independent of physical activity levels , sedentary behaviours are associated with increased risk of cardio-metabolic disease , all-cause mortality , and a variety of physiological and psychological problems .
Therefore , the purpose of this systematic review is to determine the relationship between sedentary behaviour and health indicators in school-aged children and youth aged 5 - 17 years .