Journal of the Ergonomics Society of Korea (대한인간공학회지)

Ergonomics Society of Korea (대한인간공학회)
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A Study on the Short Break Time on VDT Work using EMG

근전도를 이용한 VDT 작업시 짧은 휴식시간에 관한 연구

  • Kim, Yu-Chang (Department of Industrial Management Engineering, Dongeui University) ;
  • Lee, Jun-Pal (Department of Industrial Management Engineering, Dongeui University)
  • 김유창 (동의대학교 산업경영공학과) ;
  • 이준팔 (동의대학교 산업경영공학과)
  • Published : 2007.11.30
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Abstract

This paper suggested the best work conditions including short break time and the number of mouse clicks on the computer work for the prevention of MSDs on VDT work. Fatigue measures included EMG based parameters. The short break time conditions are grouped into 7, 15, and 30 seconds after every work for 10 min and the number of mouse clicks are divided into 10, 20, and 30 clicks/min. The result of the ANOVA of the shift value of %MVC(Maximum Voluntary Contraction) showed the following: 1) There was a considerable difference as regards to the break time except the number of mouse clicks on the upper trapezius muscle(p$<$0.05). The best conditions were shown in 15 sec after every 10 min and 30 clicks/min. 2) There were considerable differences as regards to the number of mouse clicks except the break time on the extensor digitorum muscle and extensor carpi ulnaris muscle(p$<$0.05). The best conditions were shown in 7 sec after every 10min and 10 clicks/min.

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