Jeon Ji Kyeng, Lim Hee Sung, Shin Sung Rae, Kim Bo Hyun, Lee Suk Min
Department of Physical Therapy, Sahmyook University.
J Phys Ther Sci. 2013 Jul;25(7):853-6. doi: 10.1589/jpts.25.853. Epub 2013 Aug 20.
[Purpose] This study investigated the muscle activity differences of three different lumbar stabilization exercises in a comparison of middle-aged and young women. [Subjects] Seventeen middle-aged women and fifteen young women were enrolled in this study. Patients with a history of any neurologic disorders, orthopedic disorders, or cardiopulmonary problems that would have affected their lumbar stabilization exercise performance were excluded. [Methods] All subjects performed 3 exercises while the surface electromographic activity was recorded of the rectus abdominis, internal oblique, multifidus, and iliocostalis lumbolum. The mean electromyographic amplitudes obtained during the exercise were normalized to the amplitude of maximal voluntary isometric contraction (%MVIC) to produce an inter-individually comparable muscle activity index. [Results] The highest muscle activity of middle-aged women was observed in the ring bridging exercise. The middle-aged women had higher levels of all muscle activaties than the young women, particularly in the multifidus muscle and iliocostalis lumborum. No significant difference in muscle activity ratio was observed between the local muscles and global muscles in the three different exercises, though the muscle activity ratio was the highest in the ring bridging exercise. The young women group showed a higher ratio of the internal oblique/rectus abdominus than the middle aged women in the bridging exercise. [Conclusion] The ring bridging exercise should be used for stabilizing the lumbar area because the young women showed a higher ratio than the middle aged women.
[目的] 本研究调查了中年女性和年轻女性在三种不同的腰椎稳定练习中的肌肉活动差异。[对象] 本研究招募了17名中年女性和15名年轻女性。排除有任何可能影响其腰椎稳定练习表现的神经疾病、骨科疾病或心肺问题病史的患者。[方法] 所有受试者进行3项练习，同时记录腹直肌、腹内斜肌、多裂肌和腰髂肋肌的表面肌电活动。将运动过程中获得的平均肌电幅度归一化为最大自主等长收缩幅度（%MVIC），以产生个体间可比的肌肉活动指数。[结果] 在环形桥接练习中观察到中年女性的肌肉活动最高。中年女性的所有肌肉活动水平均高于年轻女性，尤其是在多裂肌和腰髂肋肌中。在三种不同练习中，局部肌肉和整体肌肉之间的肌肉活动比率未观察到显著差异，尽管在环形桥接练习中肌肉活动比率最高。在桥接练习中，年轻女性组的腹内斜肌/腹直肌比率高于中年女性。[结论] 环形桥接练习应用于稳定腰椎区域，因为年轻女性的比率高于中年女性。
