Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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A Study on Evaluation of Neck Muscle Workload in Static Work Using EMG

정적인 자세에서 근전도를 이용한 목 근육의 작업부하 평가

  • Kim, Yu-Chang (Department of Industrial Management Engineering, Dongeui University) ;
  • Jeong, Hyun-Wook (Daewoo Shipbuilding & Marine Engineering Co,, LTD.) ;
  • Jang, Seong-Rok (Division of Safety Engineering, Pukyong National University)
  • Published : 2005.12.31
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Abstract

Computer dominated jobs and industrial automation have rapidly created work-related musculoskeletal disorders(WMSDs) and WMSDS are expanding to employee of other general industry. Specific risk factors associated with WMSDs include repetitive motion, heavy lifting, forceful exertion, contact stress, vibration awkward posture and rapid hand and wrist movement. The purpose of this paper is to analyze the effects of the neck muscle workload according to posture(joint angle) and load weight. Seven male students participated in this study. To analyze neck muscle workload was studied on electromyographic(EMG) activity for sternocleidomastoid and trapezius, was subjectively rated using a Borg's CR-10 scale. ANOVA showed that the CR-10 ratings and most EMG root-mean-square (RMS) value were statistically significant improvement according to posture(joint angle) and load weight. The results of this study indicate the joint angle and weight of neck muscle workload to provide safe working conditions. To reduce the large number and severity of WMSDs employees have been experiencing, we need to redesign the job in workplace to identify and control hazards that are reasonably likely to be causing or contributing to the WMSDs.

Keywords

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