Moisan Gabriel, Mainville Camille, Descarreaux Martin, Cantin Vincent
Département d'anatomie, Université du Québec à Trois-Rivières, Trois-Rivières, Canada; Groupe de recherche sur les affections neuro-musculo-squelettiques (GRAN), Université du Québec à Trois-Rivières, 3351 Boul Des Forges, Trois-Rivières, Quebec, G9A 5H7, Canada.
Département des sciences de l'activité physique, Université du Québec à Trois-Rivières, 3351 Boul Des Forges, Trois-Rivières, Quebec, G9A 5H7, Canada; Groupe de recherche sur les affections neuro-musculo-squelettiques (GRAN), Université du Québec à Trois-Rivières, 3351 Boul Des Forges, Trois-Rivières, Quebec, G9A 5H7, Canada.
Phys Ther Sport. 2019 Nov;40:53-58. doi: 10.1016/j.ptsp.2019.08.009. Epub 2019 Aug 25.
To evaluate the kinematic, kinetic and electromyographic (EMG) immediate effects of foot orthoses (FOs) during walking, maximal single-leg side jump landing (SIDE) and unilateral drop landing on even (DROP), inclined and unstable (FOAM) surfaces in individuals with chronic ankle instability (CAI).
Cohort study.
Biomechanics laboratory.
26 healthy individuals with CAI.
Ankle and knee angles/moments and lower-limb EMG of the gluteus medius, vastus medialis, vastus lateralis, biceps femoris, gastrocnemis medialis, gastrocnemius lateralis, peroneus longus and tibialis anterior muscles.
The main results are that with FOs, individuals with CAI exhibited decreased tibialis anterior muscle activity from 19 to 38% and 39-99% of the landing phase during the DROP task. They also exhibited increased biceps femoris muscle activity from 56 to 65% of the preactivation phase during walking. No significant ankle and knee joints angles and moments difference was observed when wearing FOs in any of the experimental tasks.
The results of this study suggest that the biomechanical effects of FOs are task-dependent and only affect EMG activity. They will help clinicians and researchers to better understand FOs' role in treatment and prevention of CAI.
评估足矫形器（FOs）对慢性踝关节不稳（CAI）个体在行走、最大单腿侧跳落地（SIDE）以及在平坦（DROP）、倾斜和不稳定（FOAM）表面进行单侧下落落地时的运动学、动力学和肌电图（EMG）即时影响。
队列研究。
生物力学实验室。
26名患有CAI的健康个体。
踝关节和膝关节角度/力矩以及臀中肌、股内侧肌、股外侧肌、股二头肌、腓肠肌内侧头、腓肠肌外侧头、腓骨长肌和胫骨前肌的下肢肌电图。
主要结果是，使用FOs时，患有CAI的个体在DROP任务的落地阶段，胫骨前肌活动减少了19%至38%以及39%至99%。他们在行走时的预激活阶段，股二头肌活动也从56%增加到了65%。在任何实验任务中佩戴FOs时，未观察到踝关节和膝关节角度及力矩有显著差异。
本研究结果表明，FOs的生物力学效应取决于任务，且仅影响肌电图活动。它们将有助于临床医生和研究人员更好地理解FOs在CAI治疗和预防中的作用。
