Wegner-Czerniak Katarzyna, Mączyński Jacek, Błaszczyk Anna, Ogurkowska Małgorzata B
Department of Biomechanics, Poznan University of Physical Education, Królowej Jadwigi 27/39, 61-871 Poznan, Poland.
J Clin Med. 2025 Feb 21;14(5):1448. doi: 10.3390/jcm14051448.
The aim of this study was to investigate change in the order activation of leg muscles in relation to the spinal extensors during the Janda test and change postural balance in patients with low back pain (LBP) after muscle energy techniques (METs). The study included fifteen men (mean age 41.9 years) working on an assembly line. The activity and recruitment of the following muscles: biceps femoris (BF), gluteus maximus (GM) and erector spinae (ES) were measured with the use of surface electromyography (sEMG) during the prone hip extension (PHE) test. Pain levels and postural balance were analysed. : MET translated into a reduction in muscle activation time in both the left and right side of the body ( < 0.001). The change was observed in the following muscles: BF ( = 0.003) and GM ( = 0.004). A reduction in pain was obtained post application of the MET therapy ( < 0.001). It was observed that after the therapy, along with the later activation time of the GM muscle, the range of motion of the COP along the -axis increased ( = 0.0368). Increased activation time of the RES ( = 0.0411) and the LES ( = 0.0350) muscles influenced a decrease in the COP range of motion along the -axis. : The use of MET in people with LBP improves the sequence of activation of the ES, GM and BF muscles, affects postural balance, allows for the restoration of muscle balance in the lumbar spine and lower limbs, and reduces pain.
本研究旨在调查在扬达测试期间腿部肌肉相对于脊柱伸肌的激活顺序变化，以及肌肉能量技术（METs）对腰痛（LBP）患者姿势平衡的影响。该研究纳入了15名在装配线上工作的男性（平均年龄41.9岁）。在俯卧位髋关节伸展（PHE）测试期间，使用表面肌电图（sEMG）测量以下肌肉的活动和募集情况：股二头肌（BF）、臀大肌（GM）和竖脊肌（ES）。分析疼痛水平和姿势平衡。结果显示：MET使身体左右两侧的肌肉激活时间均缩短（<0.001）。在以下肌肉中观察到了这种变化：BF（=0.003）和GM（=0.004）。MET治疗后疼痛减轻（<0.001）。观察到治疗后，随着GM肌肉激活时间的延迟，COP沿y轴的运动范围增加（=0.0368）。RES（=0.0411）和LES（=0.0350）肌肉激活时间的增加影响了COP沿x轴的运动范围减小。结论：在LBP患者中使用MET可改善ES、GM和BF肌肉的激活顺序，影响姿势平衡，有助于恢复腰椎和下肢的肌肉平衡，并减轻疼痛。
