坐位作业工人腰部疲劳现场及模拟现场研究  

Field and Simulation Studies on Low Back Fatigue in Sedentary Workers

作　　者：牛云彤[1,2] 王生[1,2] 王起恩 何丽华 

机构地区：[1]武警医学院 [2]北京医科大学

出　　处：《中国工业医学杂志》1997年第3期145-147,共3页Chinese Journal of Industrial Medicine

摘　　要：为了探讨坐位作业工人腰部疲劳与作业时间及躯干角的关系，对２４２名坐位作业工人进行了现场调查。结果显示，工人一次连续工作时间多为３～４小时；躯干角以１０°～２０°为多，腰部症状以酸痛为主，并与躯干角显著相关。选１０名受试者在实验室模拟现场操作３小时，躯干角分别为０°、１５°、３０°。结果肌电图积分（ＩＥＭＧ）值在早期上升，达到最大值后下降。躯干角越大，值下降越明显，疲劳出现越快。提示ＩＥＭＧ值可作为反应肌肉疲劳的敏感指标。Low back fatigue and its relationship with length of employment and workers trunk angle during their operation were studied in the working fields for 242 sedentary employees.Results revealed that most of the employees worked for three to four hours in a row and their trunk angle in operation was 10° to 20°.Their low back symptoms correlated with their trunk angles significantly in the field study.Ten employees were selected for simulation operation for three hours in the laboratory,with their trunk angles of zero degree,15° and 30°,respectively.Integral value of electromyogram(IEMG) rose during the earlier time,then decreased after reaching its peak.The larger the trunk angles,the more obvious the decrease of its integral values and the more rapidly the occurrence of fatigue.It suggests that IEMG can be used as a sensitive indicator reflecting muscular fatigue.

关 键 词：疲劳 坐位作业 肌电图积分 躯干角 

分 类 号：R131[医药卫生—劳动卫生]