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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
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