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An Analysis of Fatigue Characteristics of Upper limbs by Task Conditions Change  

Lee, Sang-Do (Dept. of Industrial Management Engineering, Dong-A University)
Sim, Jeong-Hoon (Dept. of Industrial Management Engineering, Dong-A University)
Publication Information
Journal of Korean Society of Industrial and Systems Engineering / v.28, no.3, 2005 , pp. 75-86 More about this Journal
Abstract
To investigate the fatigue characteristic of upper limbs, this study analyzed RMS(root mean square) and MPF(mean power frequency) value between initial and terminal stages of each experiment condition. And the effect of intermittent endurance time was evaluated using the Borg's CR10 value that was measured for the parts of upper limb. According to the results of ANOVA on RMS value, there were significant difference on the %MVC about push, pull, and down force exertion. Particularly the ANOVA of up force exertion was significant difference on shoulder flexion, elbow flexion and rest time as well as %MVC. The results of ANOVA for MPF value were significant difference on the %MVC in regard of the push and up force exertion. In case of up force exertion, MPF value tended to shift low frequency at all of the experiment conditions. According to the analysis of duty cycle, RMS value considerably increased over 50% duty cycle and as the %MVC increased, the duty cycle affected the increase of RMS value. MPF value for up and down force exertion decreased at 33%, 50% and 67% duty cycle for all of %MVC. Borg CR10 value of hand and forearm were below the 3-point to the 40% of endurance time at 30%MVC and to the 20% of endurance time at 50%MVC with the exception of up force exertion. But Borg CR10 values of upper arm and shoulder at up force exertion were more than 3-point to the 20% of endurance time at 30%MVC and in the start point of endurance time at 50%MVC.
Keywords
MS; MPF; force exertion type; duty cycle; Borg's CR10;
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  • Reference
1 Kilbom, Å; 'Repetitive work of the upper extremity Part - The scientific basis(knowedge base) for the guide,' International Journal of Industrial Ergonomics, 14(1-2) pp. 59-86, 1994   DOI   ScienceOn
2 Borg, G.; 'Psychophysical scaling with applications in physical work and perception of exertion,' Scandinavian Journal of Work, Environment and Health, 16 pp. 55-58, 1990
3 NIOSH; 'Musculoskeletal disorders and workplace factors a critical review of epidemiologic evidence for work-related musculoskeletal disorders of the neck, upper extremity, and low back,' NIOSH publication, No. 97-141, DHHS, Cincinnati, 1997
4 Meijst, W., Dul, J. and Haslegrave, C. 'Maximum holding times for static standing postures,' TNO Institute of Preventive Health Care, Leiden, 1995
5 Dul, J., Douwes, M. and Smitt, P.; 'A work-rest model for static postures,' In Proc. 11th Congress of the International Ergonomics Association, Taylor and Francis, London, pp. 93-95, 1990
6 Bernard, B., Booth-Jones, A., Fairfield-Estill, C., Fine, L., Habe, D., Hales, T., Putz-Anderson, V. and Votaw, D.; 'The Magnitude, Science Base, and Solutions for One of the Largest Occupational Health Problems in the United States,' Proceedings of the IEA 2000/HFES 2000 Congress, pp. 4-5, 2000
7 Westgaard R. H. and Winkel, J.; 'Guidelines for occupational musculoskeletal load as a basis for intervention a critical review,' Applied Ergonomics, 27(2) pp. 79-88, 1996   DOI   ScienceOn
8 노동부, '2002 산업재해분석,' pp. 10-13, 2002
9 Herman, A.; 'Statement by the Secretary of Labor,' Alexis M., Herman Opening of the Hearings on the Ergonomics Standard, Occupational Safety and Health Administration, Department of Labor, Washington DC, 2000
10 Aptel, M., Aublet-Cuvelier, Agnes. and Cnockaert, J., C.; 'Work-related musculoskeletal disorders of the upper limb,' Joint Bone Spine, 69 pp. 546-555, 2002   DOI   ScienceOn