The Effect of Fatigue on a Static Lunge



Analysis of Movement; Kinesiology Department; Stephen F. Austin State University; Nacogdoches, Texas

Category: Undergraduate

Advisor/ Mentor: Chellete, Amber (amber.chellette@sfasu.edu)


Our hypothesis states that fatigue will impact the performance of a static lunge. We anticipated differences in both acetabulofemoral and tibiofemoral joint angles, comparing measurements taken before and after inducing fatigue. We predict that as fatigue sets in, individuals may experience difficulty maintaining joint positions during the static lunge, leading to changes in the joint angles. This hypothesis comes from the understanding that fatigue can compromise muscle function and coordination, potentially influencing the biomechanics of a static lunge. Our investigation aims to uncover the effects of fatigue on these specific joint angles, contributing to a deeper comprehension of fatigue's impact on the static lunge. Using the application OnForm we were able to take pictures of our test subjects before and after their exercise.This measured the joint angles before and after exercise. Each test subject did thirty seconds of jump squats between each lunge. The two angles that we used were the angles from the tibiofemoral and the acetabulofemoral joints. Using those two joints it allowed us to be able to most accurately determine how much their form and range of motion was affected by fatigue during the lunge. The results of this analysis prove that there is a direct relationship between fatigue and musculoskeletal movement. We had 10 test subjects (seven women and three men). Each individual had a notable change in their patellofemoral and the acetabulofemoral joints after performing jump squats for 30 seconds. Peak angles and joint range of motion were significantly reduced post fatigue in both the patellofemoral and acetabulofemoral joints. Our conclusion states that fatigue has a significant impact on posture and the range of motion of the static lunge. Data results show each of our subjects being very consistent with our hypothesis. The subjects have shown a clear connection with fatigue and musculoskeletal movements. Understanding of this connection of fatigue and biomechanics helps challenge in maintaining function and preventing further injury in clients.

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