Department of Anatomy, Université du Québec à Trois-Rivières, Trois-Rivières, Canada; Groupe de recherche sur les affections neuro-musculo-squelettiques (GRAN), Canada.
Department of Human Kinetics, Université du Québec à Trois-Rivières, Trois-Rivières, Canada; Groupe de recherche sur les affections neuro-musculo-squelettiques (GRAN), Canada.
J Electromyogr Kinesiol. 2020 Apr;51:102399. doi: 10.1016/j.jelekin.2020.102399. Epub 2020 Jan 27.
The objective of this study was to quantify the kinematic, kinetic and electromyography differences between individuals with and without chronic ankle instability (CAI) during comfortable (CW) and fast (FW) walking. Twenty-one individuals with CAI and 21 healthy controls were recruited to walk at CW and FW speeds. The dependent variables were gluteus medius, vastus lateralis, gastrocnemius lateralis, gastrocnemius medialis, peroneus longus and tibialis anterior muscles mean activity, ankle and knee angles and moments. Kinematic, kinetic and electromyography variables were compared between groups with a one-dimensional statistical non-parametric mapping analysis. The CAI group exhibited no significant difference for ankle angles and moments compared to the control group. However, the CAI group showed less external knee rotation from 56 to 100% (CW) and 51 to 98% (FW) and more knee abduction moment from 1 to 6% and 7 to 9% (CW) and 1 to 2% (FW) of the stance phase. Less gluteus medius muscle activity was also observed from 6 to 9% and 99 to 100% (CW) of the stance phase for the CAI group. These results suggest proximal biomechanical compensations and will help better understand the underlying deficits associated with CAI. They also indicate that regardless of walking speeds, individuals with CAI exhibit similar differences compared to healthy participants.
本研究的目的是定量比较慢性踝关节不稳定（CAI）患者与无 CAI 患者在舒适（CW）和快速（FW）步行时的运动学、动力学和肌电图差异。招募了 21 名 CAI 患者和 21 名健康对照者，以 CW 和 FW 速度行走。依赖变量为臀中肌、股外侧肌、腓肠外侧肌、腓肠内侧肌、比目鱼肌和胫骨前肌的平均活动、踝关节和膝关节角度和力矩。使用一维统计非参数映射分析比较组间的运动学、动力学和肌电图变量。与对照组相比，CAI 组的踝关节角度和力矩没有显著差异。然而，CAI 组在 CW 和 FW 从 56%到 100%和 51%到 98%的阶段中，膝关节外旋减少了 5%至 1%和 7%至 9%，在 CW 和 FW 从 1%到 6%和 1%到 2%的阶段中，膝关节外展力矩增加了 7%至 9%。在 CW 支撑相的 6%至 9%和 99%至 100%阶段，CAI 组的臀中肌肌肉活动也减少了 9%。这些结果表明存在近端生物力学补偿，并将有助于更好地理解与 CAI 相关的潜在缺陷。它们还表明，无论步行速度如何，CAI 患者与健康参与者相比都表现出类似的差异。
