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Muscle Timing in Injured and Non-Injured Leg of Athletes With Chronic Ankle Instability in Response to a Visual Stimulus During Forward Jumping Publisher Pubmed



Fereydounnia S1 ; Shadmehr A1 ; Talebian Moghadam S1 ; Olyaei G1 ; Jalaie S1 ; Tahmasebi A2
Authors
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Authors Affiliations
  1. 1. Physical Therapy Department, School of Rehabilitation, Tehran University of Medical Sciences, Tehran, Iran
  2. 2. Occupational Therapy Department, School of Rehabilitation, Tehran University of Medical Sciences, Tehran, Iran

Source: Journal of Bodywork and Movement Therapies Published:2016


Abstract

Objective: The aim of this study was to investigate premotor time, motor time and reaction time of the injured and non-injured leg muscles of athletes with chronic ankle instability in response to a visual stimulus during forward jumping. Methods: Surface electromyography was performed on injured and non-injured leg of eight athletes with chronic ankle instability during forward jumping. Results: Results showed that premotor time of the peroneus longus was significantly longer in non-injured leg compared with injured leg (489.37 ± 220.22 ms vs. 306.46 ± 142.92 ms, P = 0.031); on the contrary, motor time of the peroneus longus was significantly shorter in non-injured leg compared with injured leg (569.04 ± 318.62 ms vs. 715.12 ± 328.72 ms, P = 0.022). No significant difference was noted in the timing of other calf muscles (> 0.05). Conclusion: According to the results of this study, rehabilitation protocols, regarding ankle instability, need to put greater emphasis on tasks that require proper timing of muscles and muscle re-education so that protocols could reduce residual symptoms after sprain and prevent recurrent sprains. © 2015 Elsevier Ltd.
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