Significant intervention effects were found for screen-time ( mean SE : -30 10.08 min/d ; P = .03 ) , sugar-sweetened beverage consumption ( mean : -0.6 0.26 glass/d ; P = .01 ) , muscular fitness ( mean : 0.9 0.49 repetition ; P = .04 ) , and resistance training skills ( mean : 5.7 0.67 units ; P < .001 ) .