한 손 들기 작업과 내리기 작업의 요추부위(L5/S1) 부하에 대한 비교 연구
Comparison of Biomechanical Stress on Low Back(L5/S1) for One-hand Lifting and Lowering Activity
0
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
Even though two-hands lifting/lowering activity of manual materials handling tasks are prevalent at the industrial site, manymanual materials handling tasks which require the worker to perform one-hand lifting/lowering are also very common at theindustrial site, forestry, farming, and daily life. The objective of this study was to compare one-hand lowering activity to lifting activity in terms of biomechanical stressfor the range of lowering heights from knuckle height to 10cm above floor level with two workload 7.5kg and 15.0kg. Eightmale subjects with LMM were asked to perform lifting/lowering tasks using both a one-handed (left-hand and right-hand) aswell as a two-handed technique. Spinal loading was estimated through an EMG-assisted free-dynamic biomechanical model. The biomechanical stress of one-hand lowering activity was shown to be 43% lower than that of one-hand lifting activity. It was claimed that the biomechanical stress for one-hand lifting/lowering activity is almost twice (194%) of the one for two-handslifting/lowering activity. It was also found that biomechanical stress by one-hand lowering/lifting activity with the half workloadof two-hands lowering/lifting activity was greater than that of the two-hands lowering/lifting activity. Therefore, it might bea risk to consider the RWL of one-hand lowering/lifting activity to simply be a half of the RWL of two-hands lowering/liftingactivity recommended by NIOSH.
Abstract
Even though two-hands lifting/lowering activity of manual materials handling tasks are prevalent at the industrial site, manymanual materials handling tasks which require the worker to perform one-hand lifting/lowering are also very common at theindustrial site, forestry, farming, and daily life. The objective of this study was to compare one-hand lowering activity to lifting activity in terms of biomechanical stressfor the range of lowering heights from knuckle height to 10cm above floor level with two workload 7.5kg and 15.0kg. Eightmale subjects with LMM were asked to perform lifting/lowering tasks using both a one-handed (left-hand and right-hand) aswell as a two-handed technique. Spinal loading was estimated through an EMG-assisted free-dynamic biomechanical model. The biomechanical stress of one-hand lowering activity was shown to be 43% lower than that of one-hand lifting activity. It was claimed that the biomechanical stress for one-hand lifting/lowering activity is almost twice (194%) of the one for two-handslifting/lowering activity. It was also found that biomechanical stress by one-hand lowering/lifting activity with the half workloadof two-hands lowering/lifting activity was greater than that of the two-hands lowering/lifting activity. Therefore, it might bea risk to consider the RWL of one-hand lowering/lifting activity to simply be a half of the RWL of two-hands lowering/liftingactivity recommended by NIOSH.
참고문헌 (23)
- Allread, W. G., "Trunk kinematics of one-handed lifting, and the effects of asymmetry and load weight", Ergonomics, 39(2), pp.322~334 (1996)
- Davis, K. G., "Evaluation of spinal loading during lowering and lifting", Clinical Biomechanics, 13(3), pp.141~152 (1998)
- Drury, C.G., "A survey of industrial box handling", Human Factors, 24, pp.553~565 (1982)
- Gall, B., "Changes in physical capacity as a function of age in heavy manual work", Ergonomics, 47(6), pp.671~687 (2004)
- Garg, A., "Physiological response to one-handed in the horizontal plane by female workers", American Industrial Hygiene Association Journal, 44, pp.190~200 (1983)
- Garg, A., "Maximum frequency acceptable to female workers for one-handed lifts in the horizontal plane", Ergonomics, 25(9), pp.839~853 (1982)
- Kim, H. K., "Development of a Model for Combined Ergonomic Approaches in Manual Materials Handling Tasks", 박사, pp.1990
- 김홍기, "들기 작업과 내리기 작업의 생체역학적, 생리학적, 정신물리학적 기준치에 의한 비교", 대한인간공학회지, 29(1), pp.145~153 (2010), 대한인간공학회
- 김홍기, "Comparison of Compressive Forces on Low Back(L5", S1) for One-hand Lifting and Two-hands Lifting Activity, 2011, pp.30(5), 597~603[DOI]
- 김홍기, "Comparison of Biomechanical Stress on Low Back(L5", S1)for One-hand and Two-hands Lowering Activity, 2013, pp.32(5), 413~420[DOI]
- Laboratory Information Management System, "LIMS Version 1.24", AMT System, ~
- Marras, W.S., "Spine loading during asymmetric lifting using one versus two hands", Ergonomics, 41(6), pp.817~834 (1998)
- Marras, W. S., "Apparatus for monitoring the motion components of the spine", U.S. Patent Offices, Serial No. 09, 1990
- Marras, W. S., "Accuracy of a three-dimensional lumbar motion monitor for recording dynamic trunk motion characteristics", International Journal of Industrial Ergonomics, 9, pp.75~87 (1992)
- Marras, W.S., "Trunk strength during asymmetric trunk motion", Human Factors, 31, pp.667~677 (1989)
- Mital, A., "Subjective estimates of onehanded carrying tasks", Applied Ergonomics, 14, pp.265~269 (1983)
- Mital, A., "Human muscle strength definitions, measurement, and usage : Part I-Guidelines for the practitioner", International Journal of Industrial Ergonomics, 22, pp.101~121 (1998)
- Mital, A., "Human muscle strength definitions, measurement, and usage : Part Ⅱ-The scientific basis(knowledge base) for the guide", International Journal of Industrial Ergonomics, 22, pp.123~144 (1998)
- 모승민, "한손 수동물자취급에 관한 문헌 조사", 대한인간공학회지, 29(5), pp.819~829 (2010), 대한인간공학회
- Work Practices Guide for Manual Lifting, "NIOSH", Department of Health and Human Services Publication, ~, pp.No. 81-122 (1981)
- Reid, J.G., "Trunk muscle balance and muscular force", Spine, 12, pp.783~786 (1987)
- Troup, J.D.G., "A Comparison of Intraabdominal Pressure Increases, Hip Torque, and Lumbar Vertebral Compression in different Lifting Technique", Human Factors, 4 (1983)
- Waters, T.R., "Revised NIOSH equation for the design and evaluation of manual lifting tasks", Ergonomics, 36(7), pp.749~776 (1993)