There was some evidence that school-based physical activity interventions had 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 little effect on physical activity rates , systolic and diastolic blood pressure , BMI , and pulse rate .
At a minimum , a combination of printed educational material s and changes to the school curriculum that promote physical activity result ed in positive effects .
Few changes in outcomes were observed in this up date with the exception of blood cholesterol and physical activity rates .
For example blood cholesterol was no longer positively impacted upon by school-based physical activity interventions .
The evidence suggests the ongoing implementation of school-based physical activity interventions at this time , given the positive effects on behavior and one physical health status measure .
BACKGROUND The World Health Organization ( WHO ) estimates that 1.9 million deaths worldwide are attributable to physical inactivity and at least 2.6 million deaths are a result of being overweight or obese .
In addition , WHO estimates that physical inactivity causes 10 % to 16 % of cases each of breast cancer , colon , and rectal cancers as well as type 2 diabetes , and 22 % of coronary heart disease and the burden of these and other chronic diseases has rapidly increased in recent decades .
OBJECTIVES The purpose of this systematic review was to summarize the evidence of the effectiveness of school-based interventions in promoting physical activity and fitness in children and adolescents .
The Fun Families Study: intervention to reduce children's TV viewing.
Media consumption may contribute to  childhood obesity . This study developed and evaluated a theory-based , parent-focused intervention to reduce television and other media consumption to prevent and reduce childhood obesity .  Families ( n = 202 ) with children ages 6 - 9 were recruited from a large , urban multiethnic population into a r and omized controlled trial ( 101 families into the intervention group and 101 into the  control group ) , and were followed for 6 months . The intervention consisted of a 2-hour workshop and six bimonthly newsletters . Behavioral objectives included : ( i ) reduce TV watching ; ( ii ) turn off TV when nobody is watching ; ( iii ) no TV with meals ;  ( iv ) no TV in the child 's bedroom ; and ( v ) engage in fun non-media related activities .  Parents were 89 % female , 44 % white , 28 % African American , 17 % Latino , and 11 % Asian , mean age 40 years ( s.d . = 7.5 ) ; 72 % were married . Children were 49 % female , mean age 8 years ( s.d . = 0.95 ) . Sixty-five percent of households had three or more TVs and video game players ; 37 % had at least one h and held video game , and 53 % had three or more computers . Average children 's weekday media exposure was 6.1 hours . At 6 months follow-up , the intervention group was less likely to report the TV being on when nobody was watching ( adjusted odds ratio ( AOR ) = 0.23 , P < 0.05 ) , less likely to report eating snacks while watching TV ( AOR = 0.47 , P < 0.05 ) , and less likely to have a TV in the child 's bedroom ( AOR = 0.23 , P < 0.01 ) . There was a trend toward reducing actual media consumption but these outcomes did not reach statistical significance . Effective strategies to reduce children 's TV viewing were identified
There was some evidence that school-based physical activity interventions had 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 little effect on physical activity rates , systolic and diastolic blood pressure , BMI , and pulse rate .
At a minimum , a combination of printed educational material s and changes to the school curriculum that promote physical activity result ed in positive effects .
Few changes in outcomes were observed in this up date with the exception of blood cholesterol and physical activity rates .
For example blood cholesterol was no longer positively impacted upon by school-based physical activity interventions .
The evidence suggests the ongoing implementation of school-based physical activity interventions at this time , given the positive effects on behavior and one physical health status measure .
BACKGROUND The World Health Organization ( WHO ) estimates that 1.9 million deaths worldwide are attributable to physical inactivity and at least 2.6 million deaths are a result of being overweight or obese .
In addition , WHO estimates that physical inactivity causes 10 % to 16 % of cases each of breast cancer , colon , and rectal cancers as well as type 2 diabetes , and 22 % of coronary heart disease and the burden of these and other chronic diseases has rapidly increased in recent decades .
OBJECTIVES The purpose of this systematic review was to summarize the evidence of the effectiveness of school-based interventions in promoting physical activity and fitness in children and adolescents .