Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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A Psychophysical Approach on the Assessment of Lifting Loads

정신물리학적 접근방법을 이용한 들기작업의 작업하중 평가에 관한 연구

  • Park, Hyun Jin (Division for Industrial Accident Prevention in Service, Ministry of Employment and Labor) ;
  • Ock, Minwoo (Department of Safety Engineering, Graduate School, Pukyong National University) ;
  • Chang, Seong Rok (Department of Safety Engineering, Pukyong National University)
  • 박현진 (고용노동부 서비스산재예방팀) ;
  • 옥민우 (부경대학교 대학원 안전공학과) ;
  • 장성록 (부경대학교 안전공학과)
  • Received : 2011.10.05
  • Accepted : 2012.06.25
  • Published : 2012.08.31
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Abstract

Low back pain (LBP) is a major issue in modern industrialized society which is mainly caused by manual material handling (MMH) tasks. The objective of this study was to provide scientific data for establishing work standard for Korean workers throughout the laboratory experiment including some specific lifting tasks. Thirty male college students were recruited as participants. The maximum voluntary contraction (MVC), recommended weight limit (RWL), and psychophysical safety weight using Borg's CR-10 scale were studied. Results showed that the RWL was 8.4% MVC higher than the proposed psychophysical safety weight. Based on this result, it is suggested that the NIOSH lifting equation (NLE) should not be directly applied to Korean without reasonable modifications. The ratio of psychophysical safety weight to MVC was ranged from 20.1 to 26.4%. It is expected that use of the methodology in this study may provide better expectation of the work ability of Korean for reducing lower back pains caused by MMH.

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References

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