There is good evidence that school-based physical activity interventions have a positive impact on four of the nine outcome measures .
Specifically positive effects were observed for duration of physical activity , television viewing , VO2 max , and blood cholesterol .
Generally school-based interventions had no effect on leisure time physical activity rates , systolic and diastolic blood pressure , body mass index , and pulse rate .
At a minimum , a combination of printed educational material s and changes to the school curriculum that promote physical activity result in positive effects .
BACKGROUND The World Health Organization estimates that 1.9 million deaths worldwide are attributable to physical inactivity .
Chronic diseases associated with physical inactivity include cancer , diabetes and coronary heart disease .
OBJECTIVES The purpose of this systematic review is to summarize the evidence of the effectiveness of school-based interventions in promoting physical activity and fitness in children and adolescents .
Relationship between self-monitoring of diet and exercise change and subsequent risk factor changes in children and adults.
Self-monitoring is often used in health behaviour change programs ; but it is not known to what extent self-monitoring data are valid and useful in predicting changes in cardiovascular disease ( CVD ) risk .  Subjects included 72 Anglo adults , 68 Anglo children , 80 Mexican-American adults and 94 Mexican-American children . Subjects were families with fifth and sixth grade children who participated in an 18-session family-based diet and exercise change program design ed to reduce CVD risk . During the intervention , each participant self-monitored diet and aerobic physical activity .  Families were measured at baseline , 3 , 12 , and 24 months . For adults , self-monitored changes in diet correlated with changes in body mass index , systolic blood pressure , total cholesterol and LDL 1 and 2 years later . Correlations between self-monitored diet and diet-related risk factor changes were not observed among children . Correlations between self-monitored exercise and subsequent risk factor changes were not observed among adults . For children , self monitored changes in aerobic physical activity correlated significantly with changes in VO2Max and HDL/LDL ratio 1 and 2 years later . Thus , this study provides some support for the predictive validity of  diet self-monitoring  in adults and exercise self-monitoring in children
There is good evidence that school-based physical activity interventions have a positive impact on four of the nine outcome measures .
Specifically positive effects were observed for duration of physical activity , television viewing , VO2 max , and blood cholesterol .
Generally school-based interventions had no effect on leisure time physical activity rates , systolic and diastolic blood pressure , body mass index , and pulse rate .
At a minimum , a combination of printed educational material s and changes to the school curriculum that promote physical activity result in positive effects .
BACKGROUND The World Health Organization estimates that 1.9 million deaths worldwide are attributable to physical inactivity .
Chronic diseases associated with physical inactivity include cancer , diabetes and coronary heart disease .
OBJECTIVES The purpose of this systematic review is to summarize the evidence of the effectiveness of school-based interventions in promoting physical activity and fitness in children and adolescents .