Among girls , we found a reduction of adiposity in intervention versus control schools , with a decrease in TST ( -1.1 mm ; 95 % confidence interval [ CI ] -2.3 to -0.7 ) , body fat % ( -0.9 % ; 95 % CI -1.3 to -0.4 ) , waist circumference ( -2.7 cm ; 95 % CI -4.5 to -0.9 ) , and an increase in fat-free mass ( 0.3 kg ; 95 % CI 0.01 to 0.6 ) .