Results There was consistent evidence for a positive association between MF and physical activity .
For both MF components , there was support for objective ly measured physical activity , particularly for activity of vigorous intensity .
Sports participation was also consistently linked with both MF components , whereas the association with active transport was inconsistent .
For both MF components , associations with sedentary behaviors were inconsistent irrespective of measurement method , and the association between MF and sleep was considered uncertain .
Conclusions The available evidence supports a link between MF and physical activity , particularly for vigorous intensity activity and organized sports participation .
Background Muscular fitness ( MF ) is considered a powerful marker of health , but the extent to which common health behaviors are associated with MF during childhood and adolescence is currently unclear .
Objective We conducted a systematic review of studies investigating associations between MF ( i.e. , strength/power , local muscular endurance ) and physical activity , sedentary behaviors , and sleep in children and adolescents .
Association of sports club participation with fitness and fatness in children.
UNLABELLED Decreased fitness and increased fatness are relevant factors for decreased cardiovascular and bone health in children . One way to increase physical activity and hence fitness and to reduce the risk for overweight might be sports club participation ( SCP ) . PURPOSE To investigate the association of SCP with fatness and fitness in children in general and in those with increased risk for overweight and /or low fitness . METHODS A cross-sectional study was conducted in a r and om sample of 502 first- and fifth- grade primary school children . Fitness components were determined by 10 motor tests and body fatness by the sum of four skinfolds . SCP was defined as participation of at least once a week . RESULTS Two thirds of all children were participating in a sports club . Girls ' and boys ' participation rate as well as those of overweight children and of children with overweight parents were comparable to their respective normal weight peers . In contrast , children from migrant families ( odds ratio = 0.31 ; 95 % confidence interval = 0.20 - 0.48 ) and from inactive parents ( odds ratio = 0.16 ; 95 % confidence interval = 0.05 - 0.45 ) participated significantly less ( all P < 0.001 ) . SCP was associated with endurance ( 0.53 > beta > 0.37 , all P < 0.05 ) and partly with speed , strength , and coordination ( 0.41 > beta > 0.18 , all P < 0.05 ) . In overweight children and in children from overweight parents and migrant families , this association was not found . There was no association between SCP and fatness in any of the groups . CONCLUSIONS SCP rates were high and were associated with higher levels of most fitness components in children . Participation rates were lower for children of migrant families and children from inactive parents . In addition , the association between SCP and fitness components was not found in overweight children and in children from overweight parents and migrant families
Results There was consistent evidence for a positive association between MF and physical activity .
For both MF components , there was support for objective ly measured physical activity , particularly for activity of vigorous intensity .
Sports participation was also consistently linked with both MF components , whereas the association with active transport was inconsistent .
For both MF components , associations with sedentary behaviors were inconsistent irrespective of measurement method , and the association between MF and sleep was considered uncertain .
Conclusions The available evidence supports a link between MF and physical activity , particularly for vigorous intensity activity and organized sports participation .
Background Muscular fitness ( MF ) is considered a powerful marker of health , but the extent to which common health behaviors are associated with MF during childhood and adolescence is currently unclear .
Objective We conducted a systematic review of studies investigating associations between MF ( i.e. , strength/power , local muscular endurance ) and physical activity , sedentary behaviors , and sleep in children and adolescents .