Document Type : Research Paper
Authors
1 Department of Physical Education and Sport Sciences, Faculty of Human and Social Sciences, University of Kurdistan, Sanandaj, Iran
2 Department of Physical Education and Sport Sciences, Faculty of Humanities and Social Sciences, University of Kurdistan , Sanandaj, Kurdistan, Iran
Abstract
This study aimed to examine the effect of shoe collar height on the co-contraction ratio of lower limb muscles in male athletes with and without CAI during balance tests. 28 male athletes (14 with CAI, and 14 without CAI) were selected as a statistical sample. Electrical activity of the tibialis anterior, proneous longus, gastrocnemius medialis and lateralis, soleus, vastus medialis and lateralis, and biceps femoris muscles in three positions with bare feet, with short and high shoe collar during the single leg stance time and Y balance tests were measured to calculate the co-contraction ratio. Findings indicated that the shoe collar height significantly affected the co-contraction ratio during the balance tests (P=0.001). Also, the results showed that during the balance tests, the co-contraction ratio in the barefoot position was more than in the short and high-collar shoe positions and the co-contraction ratio in the short-collar shoe was more than the high-collar shoe. On the other hand, the results showed that the shoe collar height had no significant effect on the co-contraction ratio of the muscles during the balance tests between the two groups (P˃0.05). On the other hand, the co-contraction ratio in the posterolateral direction was higher than in the anterior and posteromedial directions, and the co-contraction ratio in the anterior direction was higher than in the posteromedial direction. Regarding to findings, it is recommended to athletes with CAI to use high-collar shoes in training and race to reduce fatigue and prevent sports injuries.
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