BMI expressed as a percentage of the 95th percentile decreased by 6.8 % [ 95 % CI : -8.8 to -4.9 ] , ISI increased by 0.2 [ 95 % CI : 0.06 to 0.39 ] and percent body fat decreased by 2.4 % [ 95 % CI : -3.4 to -1.3 ] .