Neuromuscular Research Lab, Faculdade de Motricidade Humana, Universidade de Lisboa, Lisboa, Portugal.
Neuromuscular Research Lab, Faculdade de Motricidade Humana, Universidade de Lisboa, Lisboa, Portugal; CIPER, Faculdade de Motricidade Humana, Universidade de Lisboa, Lisboa, Portugal.
J Electromyogr Kinesiol. 2021 Apr;57:102530. doi: 10.1016/j.jelekin.2021.102530. Epub 2021 Feb 9.
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.
动态膝关节过度外翻是一种多平面运动，与前交叉韧带损伤和髌股疼痛综合征有关。动态膝关节过度外翻的临床评估通常通过在过头深蹲时观察内侧膝关节位移（MKD）的外观来进行。本研究旨在确定与 MKD 相关的运动学和神经肌肉参数。22 名女性进行了过头深蹲，并被分配到对照组（n=14）或 MKD 组（n=8）。采集下肢肌电图和运动学数据。我们观察到，在过头深蹲的离心阶段，MKD 表现出更大的肌肉活动，在以下肌肉中：大内收肌、股二头肌、股外侧肌和股内侧肌。在向心阶段没有观察到组间差异。在运动学方面，与对照组相比，MKD 组的膝关节内旋、膝关节外展和踝关节外展更大。来自深蹲肌肉活动结果和运动学的综合信息有助于解释过度内侧膝关节位移的发生，从而为健康专业人员提供相关信息以解决这种受伤风险因素。
