There was no change in peak oxygen uptake from baseline to follow-up in either group ( intervention group 27.9 ( 4.7 ) to 28.8 ( 5.6 ) mLkg ( -1 ) min ( -1 ) , control group 32.0 ( 6.2 ) to 32.8 ( 5.8 ) mLkg ( -1 ) min ( -1 ) , with no between-group difference , p = 0.22 ) .