After the 12-week study period , participants in the TCC group experienced a significant 14 % increase in Vo2 peak from baseline ( 21.6 5.2 to 24.6 5.2 mL/kg per minute ) , whereas control participants had a nonsignificant 5 % decline in Vo2 peak ( 20.4 5.1 to 19.4 4.4 mL/kg per minute ) .