Department of Health and Exercise Science, University of Oklahoma, Norman, OK, USA.
Physiol Meas. 2013 Oct;34(10):1343-50. doi: 10.1088/0967-3334/34/10/1343. Epub 2013 Sep 18.
Musculoskeletal disorders are some of the most commonly occurring chronic conditions affecting the US population, with the most self-reported and diagnosed disorder being low back pain. Low back pain is often due to suboptimal back muscle function, at least in part, as a result of muscle inactivity and disuse. Resistance exercise has been shown to be successful in the treatment of low back pain. The purpose of the present investigation was to examine resting mechanomyographic (MMG) amplitude for the erector spinae and trapezius muscles prior to and following resistance exercise. Twenty healthy, college-aged men were measured for resting MMG amplitude levels prior to, and following a resistance training workout. The workout consisted of three sets of ten repetitions on the conventional deadlift, bent-over row, and lat pulldown exercises, with 1 min of rest between all sets and exercises. The results showed that there were approximate 10% and 15% decreases in normalized MMG amplitude after exercise for the erector spinae and trapezius muscles, respectively. These findings demonstrate a relaxation effect in the back muscles after exercise that could potentially be helpful in alleviating low back pain.
肌肉骨骼疾病是影响美国人群的最常见的慢性疾病之一，其中自我报告和诊断最多的疾病是腰痛。腰痛通常是由于背部肌肉功能不佳引起的，至少部分原因是肌肉活动减少和废用。阻力运动已被证明对腰痛的治疗是成功的。本研究的目的是在进行阻力运动之前和之后检查竖脊肌和斜方肌的静息肌动描记（MMG）幅度。20 名健康的大学生男子在进行阻力训练之前和之后测量静息 MMG 幅度水平。锻炼包括三组，每组 10 次，包括传统硬拉、俯身划船和下拉练习，每组和练习之间休息 1 分钟。结果表明，竖脊肌和斜方肌的 MMG 幅度在运动后分别约降低了 10%和 15%。这些发现表明运动后背部肌肉有放松效应，这可能有助于缓解腰痛。
