지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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초록· 키워드
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Objective: The objective of this study was to compare one-hand and two-hands lifting activity in terms of biomechanical stress for the range of lifting heights from 10㎝ above floor level to knuckle height. Background: Even though two-hands lifting activity of manual materials handling tasks are prevalent at the industrial site, many manual materials handling tasks which require the worker to perform one-hand lifting are also very common at the industrial site and forestry and farming. Method: Eight male subjects were asked to perform lifting tasks using both a one-handed as well as a two-handed lifting technique. Trunk muscle electromyographic activity was recorded while the subjects performed the lifting tasks. This information was used as input to an EMG-assisted free-dynamic biomechanical model that predicted spinal loading in three dimensions. Results: It was shown that for the left-hand lifting tasks, the values of moment, lateral shear force, A-P shear force, and compressive force were increased by the average 43%, as the workload was increased twice from 7.5㎏ to 15.0㎏. For the right-hand lifting task, these were increased by the average 34%. For the two-hands lifting tasks, these were increased by the average 25%. The lateral shear forces at L5/S1 of one-hand lifting tasks, notwithstanding the half of the workload of two-hands lifting tasks, were very high in the 300~317% of the one of two-hands lifting tasks. The moments at L5/S1 of one-hand lifting tasks were 126~166% of the one of two-hands lifting tasks. Conclusion: It is concluded that the effect of workload for one-hand lifting is greater than two-hands lifting. It can also be concluded that asymmetrical effect of one-hand lifting is much greater than workload effect. Application: The results of this study can be used to provide guidelines of recommended safe weights for tasks involved in one-hand lifting activity.
목차
ABSTRACT
1. Introduction
2. Design of Experiments and Experimental Procedures
3. Results and Analysis
4. Discussion
5. Conclusion and Recommendations
Acknowledgements
References
Author listings
참고문헌 (19)
참고문헌 신청
1. [학술지(정기간행물)] - Allread, W. G / 1996 / Trunk kinematics of one-handed lifting, and the effects of asymmetry and load weight / Ergonomics 39 (2) : 322 ~ 334
2. [기타자료] - Bertec Force Plate 4060A / / Bertec Corporation, 6171 Huntley Road, Suite 3
3. [학술지(정기간행물)] - Freivalds, A / 1984 / A Dynamic Biomechanical Evaluation of Lifting Maximum Acceptable Loads / Journal of Biomechanics 17 (4) : 251 ~ 262
4. [학술지(정기간행물)] - Gall, B / 2004 / Changes in physical capacity as a function of age in heavy manual work / Ergonomics 47 (6) : 671 ~ 687
5. [학술지(정기간행물)] - Garg, A / 1983 / Physiological response to one-handed in the horizontal plane by female workers / American Industrial Hygiene Association Journal 44 : 190 ~ 200
2. [기타자료] - Bertec Force Plate 4060A / / Bertec Corporation, 6171 Huntley Road, Suite 3
3. [학술지(정기간행물)] - Freivalds, A / 1984 / A Dynamic Biomechanical Evaluation of Lifting Maximum Acceptable Loads / Journal of Biomechanics 17 (4) : 251 ~ 262
4. [학술지(정기간행물)] - Gall, B / 2004 / Changes in physical capacity as a function of age in heavy manual work / Ergonomics 47 (6) : 671 ~ 687
5. [학술지(정기간행물)] - Garg, A / 1983 / Physiological response to one-handed in the horizontal plane by female workers / American Industrial Hygiene Association Journal 44 : 190 ~ 200
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UCI(KEPA) : I410-ECN-0101-2013-530-001350318