Effect of lower extremity fatigue on knee joint kinematics during landing maneuvers in adult soccer players
Poster Presentation
Paper ID : 1196-12THCONG
Oral / Poster Presentation File: sample_template_en_1.jpg
Authors
1Masters student in Faculty of Sport and Health Sciences-Department of Rehabilitation in Sport, Shahid Beheshti University,Tehran،Iran
2Assistant Professor in Faculty of Sport and Health Sciences-Department of Rehabilitation in Sport, Shahid Beheshti University,Tehran،Iran
3Associate Professor in Faculty of Sport and Health Sciences-Department of Rehabilitation in Sport,Shahid Beheshti University،Tehran،Iran
Abstract
Fatigue of different lower extremity areas can affect the movement pattern of this part of the body and cause joint-related kinematic changes that may Increase ACL injury risk.The aim of this study was to investigate the effect of lower extremity fatigue on knee joint kinematics during landing in adult soccer players.
10 male Asiavision League football players of Tehran participated in this study. Subjects performed the pre-test, which included jumping and landing on a 40-cm box and recording infrared cameras with a motion analyzer. The lower extremity fatigue protocol consisted of 10 repetition of single leg squats up to 90 degrees of knee flexion, 2 vertical jumps with a single leg, and 2 repetitions of step up and down a 31cm step. This set of exercises was a set of protocols. Each subject was asked to rate his or her fatigue level using the Borg RPE Scale of 0–10. When the person announced a number of sets after performing several sets of tests, he received a single-leg for distance test to ensure fatigue. Before and after the fatigue protocol, single-leg for distance test was used to by subjects, which was a measure of fatigue. After the fatigue protocol, post-test was performed. In this study, researchers used the Kintools section of the plugin software that is attached to the Cortex software to segment and obtain kinematic information. Data were analyzed using Shapirovilk test for normality of the data, and paired T-test was used to compare mean in pre-test and post-test in dependent variables. Statistically significant difference was set at p≤0.05.
The results of independent T-test for comparison of kinematic data showed that Contact flexion had a significant difference from pre-test to post-test and other kinematic variables had no significant changes from pre-test to post-test.
According to the findings of this study, it can be concluded that lower extremity fatigue in the present study partly caused kinematic changes in predicting ACL injury. Kinematic changes have included a decrease in Contact flexion, which is one of the predictors of ACL injury during landing.
10 male Asiavision League football players of Tehran participated in this study. Subjects performed the pre-test, which included jumping and landing on a 40-cm box and recording infrared cameras with a motion analyzer. The lower extremity fatigue protocol consisted of 10 repetition of single leg squats up to 90 degrees of knee flexion, 2 vertical jumps with a single leg, and 2 repetitions of step up and down a 31cm step. This set of exercises was a set of protocols. Each subject was asked to rate his or her fatigue level using the Borg RPE Scale of 0–10. When the person announced a number of sets after performing several sets of tests, he received a single-leg for distance test to ensure fatigue. Before and after the fatigue protocol, single-leg for distance test was used to by subjects, which was a measure of fatigue. After the fatigue protocol, post-test was performed. In this study, researchers used the Kintools section of the plugin software that is attached to the Cortex software to segment and obtain kinematic information. Data were analyzed using Shapirovilk test for normality of the data, and paired T-test was used to compare mean in pre-test and post-test in dependent variables. Statistically significant difference was set at p≤0.05.
The results of independent T-test for comparison of kinematic data showed that Contact flexion had a significant difference from pre-test to post-test and other kinematic variables had no significant changes from pre-test to post-test.
According to the findings of this study, it can be concluded that lower extremity fatigue in the present study partly caused kinematic changes in predicting ACL injury. Kinematic changes have included a decrease in Contact flexion, which is one of the predictors of ACL injury during landing.
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