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 .
ENERGY BALANCE IN ADOLESCENT GIRLS: THE TRIAL OF ACTIVITY FOR ADOLESCENT GIRLS COHORT
Objectives To study correlates of change in BMI percentile and body fat among adolescent girls Design and Methods A longitudinal prospect i ve study following 265 girls from the Trial of Activity for Adolescent Girls ( TAAG ) cohort measured in 8th grade and during 10 and 11th grade or 11th and 12th grade . Twice during 2009 - 2011 girls wore an accelerometer and completed a food frequency question naire and 7-day diary documenting trips and food eaten away from home and school . Physical activity , BMI , and percent body fat were objective ly measured at each time point . Results Moderate to vigorous physical activity ( MVPA ) declined , but was not independently associated with changes in BMI percentile . Increased vigorous physical activity was associated with reductions in body fat . Diet was associated with both changes in BMI percentile and body fat . Girls who increased the percentage of caloric intake from snacks and desserts reduced their BMI percentile and body fat . Conclusions Some relationships between energy balance behaviors and BMI and body composition were counter-intuitive . While it is plausible that vigorous activity would result in reductions of body fat , until more accurate methods are devised to measure diet , the precise contribution of dietary composition to health will be difficult to assess
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 .