Journal of the Ergonomics Society of Korea (대한인간공학회지)

Ergonomics Society of Korea (대한인간공학회)
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Effects of Material Position on Postural Stability during Manual Material Handling Tasks

인력물자취급작업시 작업 대상물의 위치가 신체자세동요에 미치는 영향

  • 박재규 (한남대 산업시스템공학과, 고려대 산업시스템정보공학과) ;
  • 박성하 (한남대학교 산업시스템공학과)
  • Published : 2004.11.30
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Abstract

The objective of this study is to identify the effects of material position and physical fatigue on postural stability. Ten male subjects participated in this study. After bicycling exercises, their centers of pressure (COPs) were measured under four material handling positions and four excercise levels. The measured COPs were then utilized to calculate postural sway length in each experimental condition. Subjects' postural stability was quantified using the sway length. Results showed that the effect of different material handling position was significant on the postural sway length in both the posterior-anterior axis and the medio-lateral axis. Results also showed that the postural sway length was increased as physical fatigue accumulated, significantly in subject's posterior-anterior axis. The results imply that bearing a material on the back or front with both hands appeared to cause least sway length and instability.

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