赵霞, 孙伟, 李珏, 李玉珍, 刘萍, 顾永恩, 贾宁, 张雪艳, 王忠旭. 模拟持铆钉枪拧螺丝作业者腕部肌肉负荷和血生化指标的关联性分析[J]. 环境与职业医学, 2015, 32(5): 385-392. DOI: 10.13213/j.cnki.jeom.2015.14731
引用本文: 赵霞, 孙伟, 李珏, 李玉珍, 刘萍, 顾永恩, 贾宁, 张雪艳, 王忠旭. 模拟持铆钉枪拧螺丝作业者腕部肌肉负荷和血生化指标的关联性分析[J]. 环境与职业医学, 2015, 32(5): 385-392. DOI: 10.13213/j.cnki.jeom.2015.14731
ZHAO Xia , SUN Wei , LI Jue , LI Yu-zhen , LIU Ping , GU Yong-en , JIA Ning , ZHANG Xue-yan , WANG Zhong-xu . Correlation between Wrist Muscle Load and Blood Biochemical Indicators during Simulating Screw Driver Operation[J]. Journal of Environmental and Occupational Medicine, 2015, 32(5): 385-392. DOI: 10.13213/j.cnki.jeom.2015.14731
Citation: ZHAO Xia , SUN Wei , LI Jue , LI Yu-zhen , LIU Ping , GU Yong-en , JIA Ning , ZHANG Xue-yan , WANG Zhong-xu . Correlation between Wrist Muscle Load and Blood Biochemical Indicators during Simulating Screw Driver Operation[J]. Journal of Environmental and Occupational Medicine, 2015, 32(5): 385-392. DOI: 10.13213/j.cnki.jeom.2015.14731

模拟持铆钉枪拧螺丝作业者腕部肌肉负荷和血生化指标的关联性分析

Correlation between Wrist Muscle Load and Blood Biochemical Indicators during Simulating Screw Driver Operation

  • 摘要: 目的 分析不同工具重量和动作重复频次负荷(模拟拧螺丝次数)下持铆钉枪拧螺丝作业致腕部肌肉疲劳过程作业者血生化指标的变化情况。

    方法 选取24名志愿者依据持枪重量(1、1.5和2 kg)随机分为3组,每组8人,各组均按5个频次负荷(0、90、135、180、225次)进行连续重复性模拟拧螺丝作业,每个频次负荷间隔5 min采血进行血生化指标的检测,包括乳酸(LA)、乳酸脱氢酶(LDH)、肌酸激酶(CK)和钙离子(Ca2+)。同时调查局部肌肉主观疲劳分值(RPE)。

    结果 志愿者平均年龄(24.80& #177;1.27)岁、身高(174.72& #177;4.25) cm、体重(68.92& #177;6.08) kg,各项指标均具有同质性。RPE随重量负荷呈线性、随频次负荷呈四项式升高趋势(均P < 0.0001);血CK、Ca2+的变化在各重量负荷组间差异均具有统计学意义(P < 0.05或P < 0.01);血CK、LDH、LA的变化在各频次负荷组间差异均具有统计学意义,且随频次负荷呈现升高趋势(P < 0.05或P < 0.01)。CK、频次负荷、RPE两两之间为中度正相关(r分别为0.6301、0.8121和0.5896);LA与频次负荷和RPE为低度正相关(r分别为0.1825和0.2167)。CK、LDH、Ca2+3项血生化指标间均为中度正相关(r分别为0.3295、0.5015和0.4342),均呈现先降后升的规律。

    结论 CK、LDH、LA是反映肌肉疲劳灵敏有效的客观指标,适合评价低负荷重复性活动的疲劳进程。频次负荷、RPE和CK三者间存在较好的相关性和量效关系。重复频次是影响低负荷重复性活动疲劳的重要因素,合理安排工作对减缓疲劳有重要意义。

     

    Abstract: Objective To examine changes of blood biochemical indicators in the course of wrist muscle fatigue associated with tool weight and movement repetition in operating screw driver simulation.

    Methods Twenty-four volunteers were recruited randomly into three groups divided by tool weights of 1,1.5,and 2 kg.Each group was asked to continuously complete repetitive simulation tasks containing five repetitiveness loads for 0,90,135,180,and 225 times.The finger blood samples were taken for detecting lactate (LA),and venous blood samples for creatine kinase (CK),lactate dehydrogenate (LDH),and calcium (Ca2+) in fiveminute interval of each load as biochemical indicators.The rating of perceived exertion (RPE) of wrist muscles was recorded as subjective indicator of fatigue.

    Results All the twenty-four volunteers' age(24.80& #177;1.27) years,height(174.72& #177;4.25) cm,weight(68.92& #177;6.08) kgwere homogenous.The RPE scores showed a linearly rise with increase in tool weight load (P < 0.000 1) and a quartic rise with increase in repetitiveness load (P < 0.000 1).There were significant changes of blood CK and Ca2+ concentrations among the three weight load groups (P < 0.05 or P < 0.01).There were significant changes of blood CK,LDH,and LA concentrations among the five repetitiveness load groups (P < 0.05 or P < 0.01) that appeared rising tendencies with higher repetitiveness load (P < 0.05).Moderate positive correlations were identified among CK,repetitiveness load,and RPE,with coefficients of 0.630 1,0.812 1,and 0.589 6,respectively.Low positive correlations were identified between LA and repetitiveness load,as well as between LA and RPE,whose coefficients were 0.182 5 and 0.216 7 respectively.For biochemical indicators,moderate positive correlations were significantly shown among CK,LDH,and Ca2+,with a similar drop-rise tendency,and the coefficients were 0.329 5,0.501 5,and 0.434 2 respectively.

    Conclusion Blood CK,LDH,and LA prove to be sensitive objective indicators associated with the degree of muscle fatigue caused by low-load repetitive activities.There are obvious correlation and exposure-effect relationships among repetitiveness,RPE,and CK.Repetitiveness load appears to be an important factor causing low-load fatigue,suggesting that appropriate work assignment would be beneficial to alleviating muscle fatigue.

     

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