Figure 3.
Evolution of heart rate (HR, expressed as a percentage of peak heart rate (HRpeak) reached during the original 30-15IFT) for Group A and B as a function of relative exercise intensity during the four protocols (30-15IFT : original 30-15IFT, 30-15IFT-CONT : modified version of the 30-15IFT without resting periods, 30-15IFT-LINE : modified version of the 30-15IFT without changes of direction, 30-15IFT-28m : modified version of the 30-15IFT with 28-m shuttles.) *: p < 0.05 vs. 30-15IFT (A), †: p < 0.05 vs. 30-15IFT-LINE