Pedaling Performance Changing of Elite Cyclists Is Mainly Determined by the Fatigue of Hamstring and Vastus Muscles during Repeated Sprint Cycling Exercise

Figure 1

Experimental setup. The testing protocol is composed of 5 × 6-s sprints with 24-s recovery time between them. Subjects performed a submaximal cycling exercise at 60 rpm with the air resistance on the ergometer set to level 1, before and after repeated sprints.