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 .
Relationships of activity and sugar drink intake on fat mass development in youths.
PURPOSE To determine whether a significant relationship exists between fat mass ( FM ) development and physical activity ( PA ) and /or sugar-sweetened drink ( SD ) consumption in healthy boys and girls aged 8 - 19 yr . METHODS A total of 105 males and 103 females were assessed during childhood and adolescence for a maximum of 7 yr and a median of 5 yr . Height was measured biannually . Fat-free mass ( FFM ) and FM were assessed annually by dual x-ray absorptiometry ( DXA ) . PA  was evaluated two to three times annually using the PAQ-C/A. Energy intake and SD were assessed using a 24-h dietary intake question naire also completed two to three times per year . Years from peak height velocity were used as a biological maturity age indicator . Multilevel r and om effects models were used to test the relationship . RESULTS When controlling for maturation , FFM , and energy intake adjusted for SD ,  PA level was negatively related to FM development in males ( P<0.05 ) but not in females ( P>0.05 ) . In contrast , there was no relationship between SD and FM development of males or females ( P>0.05 ) . There was also no interaction effect between SD and PA  ( P>0.05 ) with FM development . CONCLUSION This finding lends support to the idea that increasing PA in male youths aids in the control of FM development . Models employed showed no relationship between SD and FM in either gender
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 .