Muscle timing in injured and non-injured leg of athletes with chronic ankle instability in response to a visual stimulus during forward jumping. Issue 1 (January 2016)

• Record Type: Journal Article
• Authors: Fereydounnia, Sara; Shadmehr, Azadeh; Talebian Moghadam, Saeed; Olyaei, Gholamreza; Jalaie, Shohreh; Tahmasebi, Ali
• Is Part Of: Journal of bodywork and movement therapies. Volume 20:Issue 1(2016:Jan.)
• Page Start: 3
• Page End: 9
• Publication Date: 2016-01
• Subjects: Chronic ankle instability -- Motor control strategies -- Visual stimulus -- Forward jump; Massage -- Periodicals; Exercise therapy -- Periodicals; Manipulation (Therapeutics) -- Periodicals; Electronic journals; 615.82
• DOI: 10.1016/j.jbmt.2015.01.006
• Languages: English
• ISSNs: 1360-8592

Abstract

Summary: 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 (P > 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.