Kim Min-Hee, Yoo Won-Gyu
Institute of Health Science, Yonsei University.
J Phys Ther Sci. 2013 May;25(5):535-6. doi: 10.1589/jpts.25.535. Epub 2013 Jun 29.
[Purpose] The purpose of this study was to compare the hamstring muscle (HAM) activities and flexion-relaxation ratios of an asymptomatic group and a computer work-related low back pain (LBP) group. [Subjects] For this study, we recruited 10 asymptomatic computer workers and 10 computer workers with work-related LBP. [Methods] We measured the RMS activity of each phase (flexion, full-flexion, and re-extension phase) of trunk flexion and calculated the flexion-relaxation (FR) ratio of the muscle activities of the flexion and full-flexion phases. [Results] In the computer work-related LBP group, the HAM muscle activity increased during the full-flexion phase compared to the asymptomatic group, and the FR ration was also significantly higher. [Conclusion] We thought that prolonged sitting of computer workers might cause the change in their HAM muscle activity pattern.
[目的] 本研究旨在比较无症状组和与电脑工作相关的下背痛（LBP）组的腘绳肌（HAM）活动及屈伸放松比率。[对象] 本研究招募了10名无症状的电脑工作者和10名患有与工作相关下背痛的电脑工作者。[方法] 我们测量了躯干屈曲各阶段（屈曲、全屈曲和再伸展阶段）的均方根活动，并计算了屈曲和全屈曲阶段肌肉活动的屈伸放松（FR）比率。[结果] 与无症状组相比，在与电脑工作相关的下背痛组中，全屈曲阶段HAM肌肉活动增加，且FR比率也显著更高。[结论] 我们认为电脑工作者长时间坐着可能会导致其HAM肌肉活动模式发生变化。
