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:: Volume 23, Issue 4 (12-2021) ::
J Gorgan Univ Med Sci 2021, 23(4): 10-17 Back to browse issues page
Effect of Corrective Exercise on Lower Limb Muscles’ Co-contraction in Males with Genu Valgum during Walking: A Clinical Trial Study
Farshad Ghorbanlou1 , Amir Ali Jafarnezhadgero 2
1- M.Sc Student in Sport Biomechanic, Faculty of Educational Sciences and Psychology, University of Mohaghegh Ardabili, Ardabil, Iran.
2- Associate Professor, Department of Sport Managements and Biomechanics, Faculty of Educational Sciences and Psychology, University of Mohaghegh Ardabili, Ardabil, Iran. , amiralijafarnezhad@gmail.com
Abstract:   (5317 Views)
Background and Objective: Genu valgum is one of the most common lower limb malformations that affects on walking mechanics. This study was done to evaluate the effect of corrective exercise with Thera-band on the lower limb muscles’ co-contraction in males with genu valgum during walking.
Methods: In this clinical trial study, 24 male students with genu valgus with age range of 20-30 years were randomly divided into two control (n=12) and intervention (n=12) groups. Using the caliper, the intensity of the genu valgum was measured by assessing the distance between the medial malleolus of the subjects. Corrective exercises were performed for 8 weeks using Thera-band in interventional group. The electrical activity of selected muscles was recorded by electromyography system (biometrics ltd, UK).
Results: In the interventional group, the knee joint flexor/extensor directed co-contraction was increased significantly during the heel contact phase in the post-test than that in the pre-test (P<0.05). There was also a significant increase in knee joint general co-contraction during heel off phase (P<0.05). In the interventional group, directed co-contraction of vastus lateralis / vastus medialis muscles during the swing phase was significantly increased during the post-test in compared to the pre-test (P<0.05). During post-test, knee joint flexor/extensor directed co-contraction during the heel, knee joint general
co-contraction during heel off phase and directed co-contraction of vastus lateralis / vastus medialis muscles during the swing phase were more in the interventional group in compared to control group (P<0.05).
Conclusion: The increase of general co-contraction in the knee joint during the heel off phase reflects an improvement in activity of the knee support muscles after corrective exercises and increases balance and stability. There was also an increase in the knee joint flexor / extensor direction co-contraction, which increase the distribution of the load and pressure between the femur and tibia in the knee joint.
Keywords: Genu Valgum [MeSH], Exercise Therapy [MeSH], Walking [MeSH], Muscles [MeSH]
Article ID: Vol23-48
Full-Text [PDF 690 kb]   (13860 Downloads)    
Type of Study: Original Articles | Subject: Rehabilitation
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Ghorbanlou F, Jafarnezhadgero A A. Effect of Corrective Exercise on Lower Limb Muscles’ Co-contraction in Males with Genu Valgum during Walking: A Clinical Trial Study. J Gorgan Univ Med Sci 2021; 23 (4) :10-17
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Volume 23, Issue 4 (12-2021) Back to browse issues page
مجله دانشگاه علوم پزشکی گرگان Journal of Gorgan University of Medical Sciences
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