| Electromyographical Study on Muscle Fatigue in Repetitive Forearm Tasks |
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| 作者姓名： | 戴文涛 赵晓蓉 王正伦 杨磊 |
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| 作者单位： | Department of Occupational and Environmental Health Tongji Medical College，Huazhong University of Science and Technology，Department of Occupational and Environmental Health，Tongji Medical College，Huazhong University of Science and Technology，Department of Occupational and Environmental Health，Tongji Medical College，Huazhong University of Science and Technology，Department of Occupational and Environmental Health，Tongji Medical College，Huazhong University of Science and Technology，Wuhan 430030，China Department of Occupational and Environmental Health，Guangdong University of Pharmaceutics，Guangzhou 510006，China，Wuhan 430030，China，Wuhan 430030，China，Wuhan 430030，China |
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| 基金项目： | This project was supported by a grant from the German Academic Exchange Center （Deutscher Akademischer Austauschdienst, DAAD）, The surface electromyographer used in our experi- ment was provided by the German Academic Exchange Center （Deutscher Akademischer Austauschdienst, DAAD）. Author are indebted to the student volunteers from the Public Health College of Tongji Medical College, Huazhong University of Science and Technology for their assistance. |
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| 摘 要： | The purpose of this study was to examine whether repetitive muscle tasks in low weight load might influence the fatigue of forearm muscles,and to identify ergonomic risk factors of forearm muscle fatigue in these tasks.Sixteen healthy male volunteers performed eight wrist extensions in different frequency,weight and angle loads while being instructed to keep a dominant upper limb posture as constant as possible.Surface electromyograph(sEMG) was recorded from right extensors digitorium(ED),flexor carpi radialis(FCR),flexor carpi ulnaris(FCU) and extensor carpi ulnaris(ECU) during the task performance.Our results showed that mean power frequency(MPF) and me-dian frequency(MF) values of ED,FCR and FCU were significantly lower(P<0.05) at high fre-quency load level than at low load level.However,MPF and MF values of ED were significantly lower(P<0.01) in higher load groups of frequency,angle and weight than in lower load groups.These results indicated that the fatigue of muscles varied in the same task,and the number-one risk factor of ECU,ED and FCR was angle load.
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| 关 键 词： | 肌电描记术 肌肉疲劳 前臂运动 病理因素 |
| 收稿时间： | 9 December 2006 |
| 修稿时间： | 2006-12-09 |
Electromyographical study on muscle fatigue in repetitive forearm tasks |
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| Dai Wentao,Zhao Xiaorong,Wang Zhenglun,Yang Lei.Electromyographical Study on Muscle Fatigue in Repetitive Forearm Tasks[J].Journal of Zuazhong University of Science and Technology: Medical Edition,2007,27(4):358-361. |
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| Authors: | Dai Wentao Zhao Xiaorong Wang Zhenglun Yang Lei |
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| Institution: | 1. Department of Occupational and Environmental Health, Tongji Medical College, Huazhong University of Science and Technology,Wuhan 430030, China;Department of Occupational and Environmental Health, Guangdong University of Pharmaceutics, Guangzhou 510006, China
2. Department of Occupational and Environmental Health, Tongji Medical College, Huazhong University of Science and Technology,Wuhan 430030, China |
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| Abstract: | Summary The purpose of this study was to examine whether repetitive muscle tasks in low weight load might influence the fatigue of
forearm muscles, and to identify ergonomic risk factors of forearm muscle fatigue in these tasks. Sixteen healthy male volunteers
performed eight wrist extensions in different frequency, weight and angle loads while being instructed to keep a dominant
upper limb posture as constant as possible. Surface electromyograph (sEMG) was recorded from right extensors digitorium (ED), flexor carpi radialis (FCR), flexor carpi ulnaris (FCU) and extensor carpi ulnaris (ECU) during the task performance. Our results showed that mean power frequency (MPF) and median frequency (MF) values of
ED, FCR and FCU were significantly lower (P<0.05) at high frequency load level than at low load level. However, MPF and MF values of ED were significantly lower (P<0.01) in higher load groups of frequency, angle and weight than in lower load groups. These results indicated that the fatigue
of muscles varied in the same task, and the number-one risk factor of ECU, ED and FCR was angle load.
DAI Wentao, male, born in 1968, Lecturer
This project was supported by a grant from the German Academic Exchange Center (Deutscher Akademischer Austauschdienst, DAAD). |
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| Keywords: | electromyography repetitive tasks risk factors muscle fatigue |
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