腰靠厚度与计算机操作人员腰部肌肉疲劳的关系  

Study on effect of backrest thickness to lumbar muscle fatigue during computer work

作　　者：黄燕娣[1] 王生[1] 汪彤[2] 何丽华[1] 刘元凤[2] 

机构地区：[1]北京大学医学部公共卫生学院劳动卫生与环境卫生学系,100191 [2]北京市劳动保护科学研究所

出　　处：《中华劳动卫生职业病杂志》2012年第2期113-114,共2页Chinese Journal of Industrial Hygiene and Occupational Diseases

基　　金：“十一五”科技支撑项目（2006BA106808）

摘　　要：目的 探讨腰靠厚度与计算机操作人员腰部肌肉疲劳的相关性,以确定适宜的腰靠厚度缓解计算机操作人员的肌肉疲劳.方法 选择20名健康在校大学生作为被测试者,在腰靠厚度分别为4、7、10 cm时,用肌电仪检测被测试者进行计算机操作时腰部肌肉肌电活动,应用主观问卷调查被测试者使用不同厚度腰靠时的主观舒适度及出现疲劳的时间.结果 在3种腰靠厚度条件下,1h作业均会导致腰竖脊肌肌电中值频率（MF）降低,出现肌肉疲劳；靠垫厚度为7 cm时,人体主观感觉疲劳出现时间最晚[（45.0±10.8） min],人体感觉最舒适.结论 腰靠厚度为7 cm有利于缓解腰部肌肉疲劳.1h计算机操作可导致肌肉疲劳,应安排工间休息.Objective To investigate the relationship between backrest thickness and lumbar muscle fatigue so as to confirm the fitting backrest thickness.Method Twenty subjects coming from university seated at a computer workstation in three backrest thicknesses：4,7 and 10 cm.The time that the subjects reported the lumbar muscle fatigue was collected during each trial and subjective appraise was collected at the end of the entire protocol. Results The MF value decreased and lumbar muscle felt fatigue in all three backrest thickness.Subject could feel fatigue more late[（45.0±10.8）min] and subject felt more comfort at 7 cm thickness.Conclusion It is better to relive computer worker lumbar muscle fatigue when the backrest thickness was kept on 7 cm.Work break was needed because one hour work could cause muscle fatigue.

关 键 词：腰部 肌肉疲劳 靠垫 厚度 

分 类 号：R131[医药卫生—劳动卫生]