Question naires were the more predominant way to evaluate PA .
Most studies showed that PA promotes a protective effect against a higher BF gain .
CONCLUSION It was concluded that PA has a protective effect against BF with differences between the genders and according to the BF marker or measurement assessed ; higher intensity PA leads to a greater effect against BF gain in both genders ; and the maintenance or increase of PA level on BF observed through analysis of change in PA level yielded more consistent findings in the relation between PA and BF
BACKGROUND Physical activity ( PA ) practice has been inversely associated to body  fat ( BF ) and recommended as a way to reduce and prevent obesity .
The objective of this study was to conduct a systematic review on the association of  PA and BF in adolescence .
Associations of body size and composition with physical activity in adolescent girls.
PURPOSE To examine whether components of body composition ( size , fat mass , and fat-free mass ) were related to physical activity . METHODS A r and om sample of 60 eligible sixth grade girls at each of 36 schools ( six schools per region and six regions in total sample ) ; complete measurements on 1,553 girls .  Physical activity was assessed over 6 d in each girl using an accelerometer , and body composition was assessed using a multiple regression equation using body mass index and triceps skinfold . Minutes of moderate-to-vigorous and vigorous physical activity  were estimated from accelerometer counts per 30 s above threshold values determined from a previous study . RESULTS Significant inverse relationships were found for all measures of body size and composition and all physical activity indices . The combination of fat and fat-free mass expressed as a weight and as an index ( divided by height squared ) along with race , SES , site , and school were most highly associated with physical activity in multiple regression analysis , accounting for 14 - 15 % of the variance in physical activity . Fat mass was more closely related to moderate-to-vigorous physical activity ( MVPA ) and vigorous physical activity ( VPA ) than fat-free mass with higher st and ardized regression coefficients . CONCLUSION We conclude that both fat mass or fat mass index as well as fat-free mass or fat-free mass index make independent contributions in association with physical activity levels . These indices are recommended for future studies
Question naires were the more predominant way to evaluate PA .
Most studies showed that PA promotes a protective effect against a higher BF gain .
CONCLUSION It was concluded that PA has a protective effect against BF with differences between the genders and according to the BF marker or measurement assessed ; higher intensity PA leads to a greater effect against BF gain in both genders ; and the maintenance or increase of PA level on BF observed through analysis of change in PA level yielded more consistent findings in the relation between PA and BF
BACKGROUND Physical activity ( PA ) practice has been inversely associated to body  fat ( BF ) and recommended as a way to reduce and prevent obesity .
The objective of this study was to conduct a systematic review on the association of  PA and BF in adolescence .