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들기/내리기 빈도와 회복시간 변화에 따른 몸통 근육의 피로도 분석

Title
들기/내리기 빈도와 회복시간 변화에 따른 몸통 근육의 피로도 분석
Other Titles
Analysis of Trunk Muscle Fatigue as the Frequency of Lifting/Lowering and Recovery Time Change
Author
김정룡
Keywords
Lifting/Lowering; Recovery time; Trunk muscles; Fatigue
Issue Date
2006-05
Publisher
대한인간공학회
Citation
대한인간공학회지, v. 25, No. 2, Page. 197 - 204
Abstract
The purpose of this study was to investigate the relationship between the cumulative fatigue of trunk muscles and the period of recovery time during repetitive lifting and lowering task with two different frequencies(4 times/min and 6 times/min). Eight healthy males with no prior history of LBD(low back disorders) volunteered for this study. Subjects had 2, 3, 4, and 5 minutes recovery time respectively while they were preforming the lifting and lowering task at 15% level of MVC. EMG signals from six trunk muscles were collected and the fatigue level was analyzed quantitatively. In results, the fatigue levels of LES(left elector spinae), RLD(right lattissimus dorsi), LLD(left lattissimus dorsi), RRA(right rectus abdominis) and LRA(left rectus abdominis) were recovered when 3 minutes recovery time was given at 4 times/min frequency. However, the fatgue level of RES(right elector spinae) was recovered when 4 minutes recovery was given. On the other hand, when 6 times/min frequency was used, the RLD, LLD, RRA and LRA were recovered at 5 minutes of recovery time. But for RES and LES, it took longer than 5 minutes to be recovered. This results can be applied to design the adequate length of recovery time to control the cumulative fatigue of trunk muscles in industry with repetitive lifting and lowering task.
URI
http://www.dbpia.co.kr/journal/articleDetail?nodeId=NODE00732849&language=ko_KRhttp://repository.hanyang.ac.kr/handle/20.500.11754/108033
ISSN
1229-1684
Appears in Collections:
COLLEGE OF COMPUTING[E] > MEDIA, CULTURE, AND DESIGN TECHNOLOGY(ICT융합학부) > Articles
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