中国安全科学学报 ›› 2018, Vol. 28 ›› Issue (6): 31-36.doi: 10.16265/j.cnki.issn1003-3033.2018.06.006

• 安全人体学 • 上一篇    下一篇

重复性同侧搬举负荷对竖脊肌疲劳的影响

吴旭东1 讲师, 马佩1, 王乐军2 实验师, 张胜年3 教授   

  1. 1 上海工程技术大学 高等职业技术学院,上海 200438;
    2 同济大学 体育教学部,上海 200092;
    3 上海体育学院 运动科学学院,上海 200437
  • 收稿日期:2018-03-29 修回日期:2018-05-12 出版日期:2018-06-28 发布日期:2020-11-25
  • 作者简介:吴旭东(1983—),男,浙江宁波人,硕士,讲师,主要从事运动生物力学等方面的研究。E-mail:13661488558@139.com。

Influence of repeated ipsilateral labor load on erector spinal muscle fatigue

WU Xudong1, MA Pei1, WANG Lejun2, ZHANG Shengnian3   

  1. 1 Advanced Vocational Technical College,Shanghai University of Engineering Science,Shanghai 200438,China;
    2 Physical Education Department,Tongji University,Shanghai 200029,China;
    3 School of Kinesiology,Shanghai University of Sport,Shanghai 200437,China
  • Received:2018-03-29 Revised:2018-05-12 Online:2018-06-28 Published:2020-11-25

摘要: 为预防重复性同侧搬举对竖脊肌的伤害,利用表面肌电(sEMG)技术,开展搬举试验,研究竖脊肌疲劳的影响因素。试验要求设置不同工件重量、搬举频率和搬举角度等3个负荷,并设置8个任务组;要求12名被试完成8个任务组中的右侧重复性搬举,记录相关sEMG信号,并用多元逐步回归分析竖脊肌疲劳的负荷因素。结果表明:搬举过程中随着工件重量、搬举频率和搬举角度负荷增加,sEMG频域指标平均功率频率(MPF)下降,时域指标平均肌电值(AEMG)增大,最大随意收缩肌电百分比(MVE%)增大,最大负荷左右竖脊肌最大值分别为(64.85%±11.89%)MVE和(41.24%±9.77%)MVE;各任务组搬举中,左右竖脊肌均明显疲劳,而疲劳程度不一致;重复性同侧搬举负荷对竖脊肌疲劳的影响因素从大到小依次为重量、角度和频率。

关键词: 表面肌电(sEMG), 搬举负荷, 竖脊肌, 最大随意收缩肌电百分比(MVE%), 疲劳

Abstract: To prevent the injury to erector muscle caused by repetitive ipsilateral lifting,by using the technology of sEMG,factors influencing left-right erector spinae muscle fatigue were evaluated in this paper.Acting on the experiment requirements,twelve male volunteers completed the repetitive form,right-side lifting work of eight task groups with the workpieces of different weights,frequencies and angles.The relevant sEMG signals were recorded.Then a multiple stepwise regression analysis was made to get the load factosr of erector spinal muscle fatigue.It turned out that with the increase of load factors,the mean power frequency(MPF) is reduced,the average electromyography(AEMG) is increased,and the MVE% is increased,that the maximal values of the erector spinae around the maximal load are (64.85%±11.89%) MVE and (41.24%± 9.77%) MVE respectively,that left and right erector spinae muscles are both obviously fatigued when completing the repetitive lifting work of each task group and there is a difference between them in the degree of fatigue,and that the factors affecting the repetitive ipsilateral move come in the order of weight,angle and frequency.

Key words: surface electromyography(sEMG), relocation load, erector spinae muscle, maximum voluntary contraction electromyography (MVE%), fatigue

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