Lumbar iEMG during isotonic exercise: chronic low back pain patients versus controls.
Lumbar iEMG during isotonic exercise: chronic low back pain patients versus controls.
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等张运动期间的腰部 iEMG：慢性腰痛患者与对照组。
DOI：
10.1097/00002517-199203000-00002
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
Michael MacMillan
中科院分区：
文献类型：
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作者：
Michael E. Robinson;J. Cassisi;P. O'Connor;Michael MacMillan
两项研究调查了腰椎屈伸运动中腰椎综合肌电图（iEMG）的使用。第一项研究比较了12名无痛对照者在标准等压训练期间的iEMG疲劳斜率。结果表明，在这两种情况下，弯曲-伸展重复的iEMG斜率都是负的，重物产生的疲劳斜率明显更陡。在第二项研究中，比较了16名慢性腰痛（CLBP）患者和12名无症状对照者在等张运动期间的iEMG。以标准速度记录18个腰椎伸屈周期（3分钟）的综合肌电图。每个受试者在最大伸展体位时施加的重量等于其最大等距扭矩的60%。结果表明，CLBP组在同心和偏心运动时产生的iEMG均显著减少。在两组中，偏心运动产生的iEMG明显少于同心运动。各组的iEMG疲劳斜率有显著差异，对照组的iEMG因重复而下降，而CLBP组的iEMG较平缓，略有增加。这种情况发生在偏心和同心比较中。CLBP的肌肉缺乏模型得到支持，结果表明除了力量因素外，耐力因素在康复努力中的重要性。结果还表明，在腰椎评估中使用这种方法检测不真诚努力的可能性。
Two studies investigated the use of lumbar integrated electromyography (iEMG) during flexion-extension exercises of the lumbar spine. The first study compared the iEMG fatigue slopes of 12 pain-free controls during a standardized isotonic workout with a heavy weight and a light weight. Results indicated that the slopes of the iEMG across flexion-extension repetition was negative in both conditions, with the heavy weight producing significantly steeper fatigue slopes. In the second study, iEMG was compared from 16 chronic low back pain (CLBP) patients and 12 asymptomatic controls during isotonic exercise. Integrated EMG was recorded during 18 lumbar extension-flexion cycles (3 min) at a standard pace. Each subject exercised at a weight equal to 60% of his maximum isometric torque produced at the most extended position. Results indicated significantly less iEMG was produced by the CLBP group during both concentric and eccentric exertion. For both groups, eccentric exertion produced significantly less iEMG than concentric exertion. The groups showed significantly different iEMG fatigue slopes, with the control group showing declining iEMG by repetition, while the CLBP group showed flatter, slightly increasing iEMG. This occurred for both eccentric and concentric comparisons. A muscle deficiency model of CLBP is supported and results suggest the importance of endurance factors in addition to strength in rehabilitation efforts. Results also suggest the possibility of using this methodology for detecting insincere efforts in lumbar spine assessment.