Individuals with chronic ankle instability show altered regional activation of the peroneus longus muscle during ankle eversion

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dc.coverageDOI: 10.1111/sms.14535
dc.creatorMendez-Rebolledo, Guillermo
dc.creatorGuzmán-Venegas, Rodrigo
dc.creatorCruz-Montecinos, Carlos
dc.creatorWatanabe, Kohei
dc.creatorCalatayud, Joaquín
dc.creatorMartinez-Valdes, Eduardo
dc.date2024
dc.date.accessioned2025-11-18T19:49:31Z
dc.date.available2025-11-18T19:49:31Z
dc.description<p>Individuals with chronic ankle instability (CAI) present muscular weakness and potential changes in the activation of the peroneus longus muscle, which likely explains the high recurrence of ankle sprains in this population. However, there is conflicting evidence regarding the role of the peroneus longus activity in CAI, possibly due to the limited spatial resolution of the surface electromyography (sEMG) methods (i.e., bipolar sEMG). Recent studies employing high-density sEMG (HD-sEMG) have shown that the peroneus longus presents differences in regional activation, however, it is unknown whether this regional activation is maintained under pathological conditions such as CAI. This study aimed to compare the myoelectric activity, using HD-sEMG, of each peroneus longus compartment (anterior and posterior) between individuals with and without CAI. Eighteen healthy individuals (No-CAI group) and 18 individuals with CAI were recruited. In both groups, the center of mass (COM) and the sEMG amplitude at each compartment were recorded during ankle eversion at different force levels. For the posterior compartment, the sEMG amplitude of CAI group was significantly lower than the No-CAI group (mean difference = 5.6% RMS; 95% CI = 3.4–7.6; p = 0.0001). In addition, it was observed a significant main effect for group (F<sub>1,32</sub> = 9.608; p = 0.0040) with an anterior displacement of COM for the CAI group. These findings suggest that CAI alters the regional distribution of muscle activity of the peroneus longus during ankle eversion. In practice, altered regional activation may impact strengthening programs, prevention, and rehabilitation of CAI.</p>eng
dc.identifierhttps://investigadores.uandes.cl/en/publications/0f1911e0-d67c-46a7-8d91-f259b143d29b
dc.identifier.urihttps://repositorio.uandes.cl/handle/uandes/56118
dc.languageeng
dc.rightsinfo:eu-repo/semantics/openAccess
dc.sourcevol.34 (2024) nr.1 p.1-12
dc.subjectankle sprain
dc.subjectchronic ankle instability
dc.subjectelectromyography
dc.subjectfibularis longus
dc.subjecthigh-density surface electromyography
dc.subjectneuromuscular control
dc.subjectregional activation
dc.subjectrehabilitation
dc.titleIndividuals with chronic ankle instability show altered regional activation of the peroneus longus muscle during ankle eversioneng
dc.typeArticleeng
dc.typeArtículospa
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