Distal overactivation of gastrocnemius medialis in persistent plantarflexion weakness following Achilles tendon repair

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dc.contributor.authorFuente, Carlos De la
dc.contributor.authorMartinez-Valdes, Eduardo
dc.contributor.authorRocha, Emmanuel S. da
dc.contributor.authorGeremia, Jeam M.
dc.contributor.authorVaz, Marco A.
dc.contributor.authorCarpes, Felipe P.
dc.date.accessioned2025-01-20T20:18:12Z
dc.date.available2025-01-20T20:18:12Z
dc.date.issued2023
dc.description.abstractStructural alterations of the triceps surae and Achilles tendon (AT) can promote plantarflexion weakness one-year following an AT repair, influencing the activation strategies of the Gastrocnemius Medialis (GM) muscle. However, this is yet to be demonstrated. We aimed to determine whether patients with plantar flexion weakness one-year after AT repair show altered GM spatial activation. In this cross-sectional and case-control study, ten middle-aged men (age 34 +/- 7 years old, and 12.9 +/- 1.1 months post-surgery) with a high AT total rupture score who attended conventional physiotherapy for six months after surgery, and ten healthy control men (age 28 +/- 9 years old), performed maximal and submaximal (40, 60 and 90%) voluntary isometric plantarflexion contrac-tions on a dynamometer. The peak plantar flexor torque was determined by isokinetic dynamometry and the GM neuromuscular activation was measured with a linear surface-electromyography (EMG) array. Overall EMG activation (averaged channels) increased when the muscle contraction levels increased for both groups. EMG spatial analysis in AT repaired group showed an increased activation located distally at 85-99%, 75-97%, and 79-97% of the electrode array length for 40%, 60%, and 90% of the maximal voluntary isometric contractions, respectively. In conclusion, patients with persistent plantar flexion weakness after AT rupture showed higher distal overactivation in GM.
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.jbiomech.2023.111459
dc.identifier.eissn1873-2380
dc.identifier.issn0021-9290
dc.identifier.urihttps://doi.org/10.1016/j.jbiomech.2023.111459
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/92447
dc.identifier.wosidWOS:000933078400001
dc.language.isoen
dc.revistaJournal of biomechanics
dc.rightsacceso restringido
dc.subjectStrength
dc.subjectMuscle
dc.subjectTendon tear
dc.subjectTriceps Surae
dc.subjectEMG
dc.subject.ods03 Good Health and Well-being
dc.subject.odspa03 Salud y bienestar
dc.titleDistal overactivation of gastrocnemius medialis in persistent plantarflexion weakness following Achilles tendon repair
dc.typeartículo
dc.volumen148
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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