Physical Therapy Program, Mayo Clinic, Rochester, MN, USA.
Physiother Theory Pract. 2013 Feb;29(2):113-23. doi: 10.3109/09593985.2012.704492. Epub 2012 Jul 30.
The purpose of this study was to simultaneously quantify bilateral activation/recruitment levels (% maximum voluntary isometric contraction [MVIC]) for trunk and hip musculature on both moving and stance lower limbs during resisted lateral band walking. Differential electromyographic (EMG) activity was recorded in neutral, internal, and external hip rotation in 21 healthy participants. EMG signals were collected with DE-3.1 double-differential surface electrodes at a sampling frequency of 1,000 Hz during three consecutive lateral steps. Gluteus medius average EMG activation was greater (p = 0.001) for the stance limb (52 SD 18% MVIC) than moving limb (35 SD 16% MVIC). Gluteus maximus EMG activation was greater (p = 0.002) for the stance limb (19 SD 13% MVIC) than moving limb (13 SD 9% MVIC). Erector spinae activation was greater (p = 0.007) in hip internal rotation (30 SD 13% MVIC) than neutral rotation (26 SD 10% MVIC) and the moving limb (31 SD 15% MVIC) was greater (p = 0.039) than the stance limb (23 SD 11% MVIC). Gluteus medius and maximus muscle activation were greater on the stance limb than moving limb during resisted lateral band walking. Therefore, clinicians may wish to consider using the involved limb as the stance limb during resisted lateral band walking exercise.
本研究旨在同时量化在抵抗侧向带步行时，双侧躯干和髋部肌肉在移动和支撑下肢的活动/募集水平（最大等长收缩的百分比[MVIC]）。在 21 名健康参与者中，记录了中立、内旋和外旋髋关节时的差异肌电图（EMG）活动。在三个连续的侧向步骤中，使用 DE-3.1 双差分表面电极以 1,000 Hz 的采样频率收集 EMG 信号。臀中肌的平均 EMG 激活在支撑侧（52 ± 18%MVIC）比移动侧（35 ± 16%MVIC）更大（p = 0.001）。臀大肌的 EMG 激活在支撑侧（19 ± 13%MVIC）比移动侧（13 ± 9%MVIC）更大（p = 0.002）。竖脊肌的激活在髋关节内旋（30 ± 13%MVIC）时比中立旋转（26 ± 10%MVIC）和移动侧（31 ± 15%MVIC）更大（p = 0.007），并且比支撑侧（23 ± 11%MVIC）更大（p = 0.039）。在抵抗侧向带步行时，臀中肌和臀大肌在支撑侧的激活比移动侧更大。因此，临床医生可能希望在抵抗侧向带步行运动中考虑将受累侧作为支撑侧。
