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 .
Gains in hip bone mass from high-impact training are maintained: a randomized controlled trial in children.
OBJECTIVES We previously reported significant gains in hip and spine bone mass after 7 months of high-impact training in 89 prepubertal children . Our aim in this investigation was to evaluate the bone response to 7 months of " detraining " in this cohort of children . STUDY DESIGN Seventy-four boys and girls ( n = 37 jumpers , n = 37 controls ) from the original cohort completed follow-up testing .  Bone mineral content ( BMC ; g ) and bone area ( BA ; cm(2 ) ) of the left proximal femoral neck and lumbar spine ( L(1 - 4 ) ) were assessed by dual-energy x-ray absorptiometry . In addition , anthropometric characteristics , Tanner staging , physical activity , and average dietary calcium intake were assessed . RESULTS Over 14 months , jumpers maintained 4 % greater femoral neck BMC and 4 % greater femoral neck BA ( P < .05 and P < .01 , respectively ) than controls . Group differences did not persist at the lumbar spine . CONCLUSION Gains in both BMC and BA at the femoral neck from high-impact jumping were retained after an equivalent period of detraining . We conclude that this simple exercise may be useful in promoting bone growth at the hip and , thus , enhance peak bone mass
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 .