CAJ | 학술논문

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.
목적 탐토요고후도여계산궤조작인원요부기육피로적상관성,이학정괄의적요고후도완해계산궤조작인원적기육피로.방법 선택20명건강재교대학생작위피측시자,재요고후도분별위4、7、10 cm시,용기전의검측피측시자진행계산궤조작시요부기육기전활동,응용주관문권조사피측시자사용불동후도요고시적주관서괄도급출현피로적시간.결과 재3충요고후도조건하,1h작업균회도치요수척기기전중치빈솔(MF)강저,출현기육피로；고점후도위7 cm시,인체주관감각피로출현시간최만[(45.0±10.8) min],인체감각최서괄.결론 요고후도위7 cm유리우완해요부기육피로.1h계산궤조작가도치기육피로,응안배공간휴식.
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.