The Investigation of the Muscle Timing of Anterior Cruciate Ligament Agonist and Antagonist Muscles in Athletes with Hyper Pronated Feet

Document Type : Original Research

Authors

1 Faculty of Physical education & Sport Sciences, University of Tehran, Tehran, Iran

2 Department of Health & Sport Medicine, Faculty of Physical education & Sport Sciences, University of Tehran, Tehran, Iran

3 Faculty of Physical education & Sport Sciences, University of Shahrekord, Shahrekord, Iran

Abstract

Aims: The aim of this research was to investigate the timing factors of ACL agonist and antagonist muscles in athletes with ankle pronation deformity.

Method: In the present research, 15 athletes with an increased pronation of ankle and 15 normal athletes were purposefully selected. Electromyographic signals were recorded by using surface electrode from four muscles (rectus femoris, medial hamstring, lateral hamstring, vastus medialis, vastus lateralis and Medial gastrocnemius). The MANOVA method was used as a statistical analysis to investigate muscle timing of jump-landing between the two groups.

Findings: Results showed that there is a significant difference between the two groups in muscle timing of rectus femoris (p=0/007) and vastus lateralis (p=0/002). There is also no significant difference between the muscle timing of the other muscles of the two groups (p≥0.05).

Conclusion: Increased pronation of the ankle along with change in muscle timing of rectus femoris and vastus lateralis muscles can be a risk factor in ACL injury incidences.

Keywords

Journal of Military Medicine
Volume 17, Issue 4 - Serial Number 62
March and April 2016
Pages 257-264

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