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The Effect of Corrective Exercise Program on the Knee Valgus Angle and Knee Electromyography in Elite Weightlifters
Oral Presentation
Paper ID : 1173-11THCONF
Authors
1Department of physical education, Masal Branch, Islamic Azad university, Masal, Iran
2Professor, Department of Corrective Exercise and Sport Injury, Isfahan, Iran
3Department of physical education and sport sciences, university of guilan, rasht, iran
4Professor of University of Tehran
Abstract
Introduction: ACL injury is one of the most frequent and most severe knee injuries (45%), which is associated with intermediate and long term therapy periods. Hence, the use of Prevention programs with purpose to reduce ACL injury can be a practical approach for athletes. The aim of this study was to assessing the effect of multicomponent corrective training program on the knee electromyography in elite weightlifters.
Methodology: Thirty healthy men weightlifters based on inclusion criteria were selected as subjects and randomly divided into 2 groups; the experimental group and the control group. Experimental subjects performed exercises 3 times per week for 6 weeks. Muscular activities (RMS) in both groups were registered before and after training sessions.
Results: Statistical analysis of results showed a significant increase in knee electromyographic activity of selected muscles in experimental group in response to corrective training program. There was a significant difference between experimental and control groups in medial and lateral Q:H co-contraction indices and a significant difference between two groups in quadriceps to hamstring co-activation ratio. Significant difference was observed between the two groups in the knee valgus angle and the results showed a significant decrease in knee valgus angle in the experimental group (P ≤ 0.05).
Discussion: According to the study finding, the used training protocol has an effective role in balancing neuromuscular activity and muscular strengthening. The effectiveness of current training protocol is confirmed by decreasing imbalance of Q:H ratio which can reduces the risk of ACL injury. Therefore, it is recommended in ACL injury prevention programs with focusing on more balancing in muscular activity, using training protocol that combines feedback, strength, balance and plyometric exercises can be a perfect choice for this purpose.
Methodology: Thirty healthy men weightlifters based on inclusion criteria were selected as subjects and randomly divided into 2 groups; the experimental group and the control group. Experimental subjects performed exercises 3 times per week for 6 weeks. Muscular activities (RMS) in both groups were registered before and after training sessions.
Results: Statistical analysis of results showed a significant increase in knee electromyographic activity of selected muscles in experimental group in response to corrective training program. There was a significant difference between experimental and control groups in medial and lateral Q:H co-contraction indices and a significant difference between two groups in quadriceps to hamstring co-activation ratio. Significant difference was observed between the two groups in the knee valgus angle and the results showed a significant decrease in knee valgus angle in the experimental group (P ≤ 0.05).
Discussion: According to the study finding, the used training protocol has an effective role in balancing neuromuscular activity and muscular strengthening. The effectiveness of current training protocol is confirmed by decreasing imbalance of Q:H ratio which can reduces the risk of ACL injury. Therefore, it is recommended in ACL injury prevention programs with focusing on more balancing in muscular activity, using training protocol that combines feedback, strength, balance and plyometric exercises can be a perfect choice for this purpose.
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