Fatigue, Jump Height, and Power in Jumping



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


We conducted a study on the level of fatigue after a set number of jumps for males and females. We hypothesized that by jumping a set number of times, the fatigue percentage will rise over time. PURPOSE: The purpose of this study was to compare the fatigue index and how it affects jump height and jump power. METHODS: The methods we utilized were to first have the test subjects, (5 women and 5 men that are, and have been physically active for 4 +/- 3 years), warm up with a set of 20 jumping jacks. The participants would wait 30 seconds to then proceed to step on the force plates. These force plates measured jump height, jump power, fatigue index, weight distribution from the left and right leg, etc... participants would then jump, at maximum effort with their hands on their hips, 15 times with no rest. RESULTS: The results of this analysis showed us that the jump height and jump power are higher for the males than the females However, males had an overall higher fatigue index average than the females. CONCLUSION: In conclusion, our results indicate that fatigue did increase proportionally with jumping. This can be seen by the average fatigue index of both male and female subjects. The fatigue indedicates the rate at which power output declines during a set of movements. In this study, the male subjects had a higher fatigue index than the females. In other words, the power of the male subject’s jumps decreased at a greater rate than the female subjects. Though the hypothesis was confirmed by the results, there were limitations to this study. One of the main limitations of the results is that each participant took a different amount of time to complete their 15 jumps, which could correlate to fatigue. In future studies, time could be measured to make the data more valid.

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