重复性同侧搬举劳作疲劳的表面肌电特征及主观疲劳感觉分析

发布时间：2018-04-25 04:32

本文选题：表面肌电 + 重复性　；参考：《现代预防医学》2017年08期

【摘要】：目的利用表面肌电图(surface Electromyography,s EMG)技术和主观疲劳感觉评分(Rating of Perceived Exertion,RPE)对重复性同侧搬举劳作相关肌肉疲劳进行研究。方法受试者为机电一体化专业10名男性大学生志愿者,将一个5 kg工件从右侧搬至工作台高0.85 M,工作台与箱子之间的水平距离为0.5 m,由工作人员将工件放回原位置,如此反复搬举,完成3次15 min搬举,其中完成1次15 min搬举后休息3 min,在实验过程中,用Brog10主观感觉疲劳评定表记录每5分钟4块肌肉主观疲劳感觉分数。结果在整个实验过程中,s EMG指标中位频率(Median Frequency,MF)和平均功率频率(Mean Power Frequency,MPF),随着搬举时间的延长呈下降趋势,而平均肌电值(average EMG,AEMG)值和主观疲劳感觉分数侧呈上升趋势。采用重复测量方差对MF值、MPF值和AEMG值进行分析,得出右斜方肌的疲劳程度大于左斜方肌;左竖脊肌的疲劳程度大于右竖脊肌。主观疲劳感觉评分从高到低依次是:左竖脊肌、右斜方肌、左斜方肌和右竖脊肌;采用重复测量方差分析对各肌肉在不同阶段的差异性检测,右斜方肌和左竖脊肌差异有统计学意义(P0.01),左斜方肌差异有统计学意义(P0.05),右竖脊肌差异无统计学意义(P0.05)。结论重复性同侧搬举劳作过程中,左右斜方肌之间和左右竖脊肌疲劳程度的不一致,容易引起工作相关肌肉骨骼疾患。建议企业应该根据劳作负荷和时间,科学合理安排作息时间,缓解工作中肌肉疲劳,从而有效预防相关肌肉骨骼的疾病。
[Abstract]:Objective using surface Electromyography (s EMG) technique and subjective fatigue sensation score (Rating of Perceived Exertion, RPE) to study the muscle fatigue related to duplicated movement of the same lateral movement. Methods the subjects were 10 male college students of mechatronics, and a 5 kg workpiece was moved from the right to the worktable from the right. The height of 0.85 M, the horizontal distance between the worktable and the box was 0.5 m, and the work staff put the workpiece back to the original position, so repeated lifting, completed 3 times 15 min lifting, which completed 1 15 min lifting and rest 3 min after the completion of the experiment. In the experiment, the subjective fatigue sensation score of 4 blocks of 4 blocks was recorded by the Brog10 subjective feeling fatigue assessment. The results were During the whole experiment, the median frequency (Median Frequency, MF) and the average power frequency (Mean Power Frequency, MPF) of the s EMG index decreased with the extension time, while the average EMG (average EMG, AEMG) value and the subjective fatigue sense fraction were on the rise. The fatigue degree of the right trapezius muscle is greater than that of the left trapezius muscle; the degree of fatigue of the left erector muscle is greater than that of the right erector muscle. The subjective fatigue sense score from high to low is the left erector, right trapezius, left trapezius and right erector muscles. The difference of the muscles at different stages, right trapezius muscle and left muscle, is detected by repeated measurement of variance analysis. There was statistical significance (P0.01), there was significant difference in the left trapezius muscle (P0.05), and there was no significant difference between the right vertical ridges (P0.05). Conclusion the fatigue degree of the left and right trapezius muscles and the left and right ridge muscles was not consistent during the duplication of the ipsilateral lifting, and it was easy to cause the working related musculoskeletal disorders. According to work load and time, scientific and reasonable arrangement of work and rest time, relieve muscle fatigue in work, so as to effectively prevent related musculoskeletal diseases.

【作者单位】：上海工程技术大学高等职业技术学院;同济大学体育教学部;上海体育学院运动科学学院;
【分类号】：R13

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