The Effects of Fatigue on the Movement of Squatting



Advisor / Mentor: Chelette, Amber (amber.chelette@sfasu.edu)


Fatigue is a common challenge faced by distance runners, impacting their physical performance. As runners push their bodies to cover long distances, they experience different effects such as decreased coordination, reduced endurance, and muscle tiredness. PURPOSE: The purpose of this study was to determine the effects of fatigue on distance cycling by comparing the knee angle of a squat before and after a 10-minute run on the bike. METHODS: Ten individuals participated, most were athletes or had been athletes at one point. Each participant started by doing a warm-up. Then the participants performed a squat, and the knee angles were measured using OnForm. The participants then biked for ten minutes to get a feeling of fatigue. After the ten minutes, the participants then got a one-minute break before performing another squat. The knee angles were then measured again using OnForm. Finally, the measurements of the two knee angles were then compared to determine the effects of fatigue on the movement of squatting. RESULTS: The average knee angle before the 10-minute bike ride was 75.4°.. The average knee angle after the 10-minute bike ride was: 59.2°. CONCLUSION: After spending 10 minutes on the bike and taking a 1-minute rest each participant showed a noticeable discrepancy in each of their squats. When comparing the squat angles, due to fatigue from the 10-minute cycle on the bike, the participants have less control of their muscles causing an increase in the depth of their squat. Analytics are shown in Figure 1. After doing our studies, we were able to conclude that our participants knee angle decreased after a 10-minute bike ride. In conclusion, our hypothesis was correct in the fact that the knee angle of a squat will be greater before biking than after, due to the fatigue associated with distance running.

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