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Electromyographic and kinematic analysis of females with excessive medial knee displacement in the overhead squat
Journal of Electromyography and Kinesiology ( IF 2.5 ) Pub Date : 2021-02-09 , DOI: 10.1016/j.jelekin.2021.102530
Ricardo Dinis , João R. Vaz , Luís Silva , Sérgio Marta , Pedro Pezarat-Correia

Dynamic knee valgus is a multi-planar motion that has been associated with anterior cruciate ligament injuries and patellofemoral pain syndrome. Clinical assessment of dynamic knee valgus is usually performed through visual appearance of medial knee displacement (MKD) during the overhead squat. The aim of this study is to identify the kinematic and neuromuscular parameters associated with MKD. Twenty-two females performed an overhead squat and were assigned to the control group (n = 14) or the MKD group (n = 8). Electromyography and kinematic data of the lower extremity were collected. We observed MKD to exhibit greater muscle activity in the following muscles: adductor magnus, biceps femoris, vastus lateralis and vastus medialis muscles during the eccentric phase of the overhead squat. No group differences were observed during the concentric phase. Regarding the kinematics, the MKD group showed higher knee internal rotation and, knee abduction and ankle abduction, compared to controls. The combined information from the muscle activity results and kinematics of squat helps to explain the occurrence of excessive medial knee displacement and, hence, providing relevant information for health professionals to address this injury risk factor.



中文翻译:

头顶蹲位内侧膝关节过度移位的女性的肌电图和运动学分析

动态膝外翻是一种多平面运动,与前交叉韧带损伤和pa股疼痛综合征相关。动态膝外翻的临床评估通常是通过头顶下蹲期间的内侧膝关节移位(MKD)的外观进行的。这项研究的目的是确定与MKD相关的运动学和神经肌肉参数。22名女性进行头顶蹲,并被分配为对照组(n = 14)或MKD组(n = 8)。收集下肢的肌电图和运动学数据。我们观察到MKD在以下肌肉中表现出更大的肌肉活动:内收性大腿肌,股二头肌,股外侧肌和内侧中间股肌。在同心阶段没有观察到组差异。关于运动学,与对照组相比,MKD组显示出更高的膝盖内旋度,以及膝关节外展和踝关节外展。来自肌肉活动结果和下蹲的运动学的综合信息有助于解释内侧膝关节过度移位的发生,因此,为医疗专业人员提供了解决这一伤害危险因素的相关信息。

更新日期:2021-02-16
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