Felício Lilian R, Dias Luiza A, Silva Ana P M C, Oliveira Anamaria S, Bevilaqua-Grossi Débora
Postgraduate Program of Health Science Applied of Locomotor Apparatus, School of Medicine from Ribeirão Preto (FMRP), Universidade de São Paulo (USP), Ribeirão Preto, SP, Brazil.
Rev Bras Fisioter. 2011 May-Jun;15(3):206-11.
Hip and knee muscle weaknesses have been associated with the onset of anterior knee pain (AKP). Therefore, the understanding of how squats exercises can be performed in order to optimize the electrical activity of these muscles is relevant for physical therapy treatments.
To compare the electromyographic activity of patella and pelvic stabilizers during traditional squat and squat associated with isometric hip adduction or abduction in subjects without AKP.
Electromyography signals were captured using double-differential electrodes at the vastus medialis obliquus (VMO), vastus lateralis obliquus (VLO), vastus lateralis longus (VLL) and gluteus medium (GMed) in 15 healthy and sedentary women during squats exercises: traditional and associated with hip adduction and hip abduction with load of 25% of body weight. Linear mixed models with significance level of 5% were used for data analysis.
Squat associated with hip adduction and abduction produced electromyographic activity of GMed of 0.47 (0.2) and 0.59 (0.22) respectively, while conventional squat produced an electromyiographic activity of 0.33 (0.27). The higher VMO activity was 0.59 (0.27) during the isometric contraction in the squat associated with hip adduction. The higher VLO activity was 0.60 (0.32) during isometric contraction in the squat associated with hip abduction.
Squat exercise associated with hip adduction increased VMO muscle activity as well as the activity of GMed activity.
髋部和膝部肌肉无力与前膝痛（AKP）的发病有关。因此，了解如何进行深蹲练习以优化这些肌肉的电活动对于物理治疗至关重要。
比较无AKP受试者在传统深蹲以及与等长髋内收或外展相关的深蹲过程中髌骨和骨盆稳定肌的肌电图活动。
在15名健康久坐的女性进行深蹲练习（传统深蹲以及负重为体重25%的髋内收和髋外展相关深蹲）时，使用双差分电极在股内侧斜肌（VMO）、股外侧斜肌（VLO）、股外侧长肌（VLL）和臀中肌（GMed）采集肌电图信号。采用显著性水平为5%的线性混合模型进行数据分析。
与髋内收和外展相关的深蹲分别产生的GMed肌电图活动为0.47（0.2）和0.59（0.22），而传统深蹲产生的肌电图活动为0.33（0.27）。在与髋内收相关的深蹲等长收缩过程中，VMO的最高活动为0.59（0.27）。在与髋外展相关的深蹲等长收缩过程中，VLO的最高活动为0.60（0.32）。
与髋内收相关的深蹲练习增加了VMO肌肉活动以及GMed的活动。
