Browse > Article
http://dx.doi.org/10.5143/JESK.2006.25.4.145

The Effect of Shoulder and Elbow Postures with External Loads on the Perceived Discomfort  

Kim, Dong-Jin (Department of Industrial and Management Engineering, POSTECH)
Na, Seok-Hee (Department of Industrial and Management Engineering, POSTECH)
Park, Guk-Mu (Hyundai & Kia Corporate Research & Development Division)
Publication Information
Journal of the Ergonomics Society of Korea / v.25, no.4, 2006 , pp. 145-151 More about this Journal
Abstract
The objective of this study is to investigate the perceived discomfort for postures combined with shoulder flexion/extension and elbow flexion, and external load. 12 healthy male undergraduate and graduate students participated in this experiment. Experimental variables were the shoulder flexion/extension angle(-20°, 0°, 45°, 90°, 135°), the elbow flexion angle (0°, 45°, 120°), and the external load(0, 1.5Kg, 3Kg) as independent variables and a whole body perceived discomfort using Borg's CR10 as a dependent variable. The subjects maintained the given posture for 60 seconds and then rated the perceived discomfort. The ANOVA results showed that all main factors and two-way interactions were statistically significant at α=0.05. As a result of regression analysis to examine the effect of external load on the perceived discomfort, the perceived discomfort linearly increased as the level of external load increased. Then, the effect of external load on the perceived discomfort was quantitatively classified into three levels based on the result of regression analysis.
Keywords
Perceived discomfort; Shoulder and elbow posture; External load;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Armstrong, T. J., Buckle, P., Fine, L. J., Harberg, M., Jonsson, B., Kilbom, A., Kuorinka, I. A. A., Silverstein, B. A., Sjogaard, G. and Viikari- Juntura, E. R. A., A conceptual model for work-related neck and upper-limb musculoskeletal disorders, Scandinavian Journal of Work, Environment and Health, 19(2), 73-84, 1993   DOI   ScienceOn
2 Borg, G., Borg's perceived exertion and pain scales, Human Kinetics, Champaign, IL, 1993
3 Grandjean, E. and Hunting, W., Ergonomics of postures - review of various problems of standing and sitting postures, Applied Ergonomics, 8(3), 135-140, 1977   DOI   ScienceOn
4 Hignett, S. and McAtamney, L., Rapid entire body assessment (REBA), Applied Ergonomics, 31(2), 201-205, 2000   DOI   ScienceOn
5 Karhu, O., Hrknen, R., Sorvali, P. and Vepslinen, P., Observing working postures in industry: Examples of OWAS application, Applied Ergonomics, 12(1), 13-17, 1981   DOI   ScienceOn
6 Kee, D. and Karwowski, W., LUBA: an assessment technique for postural loading on the upper body based on joint motion discomfort and maximum holding time, Applied Ergonomics, 32(4), 357-366, 2001   DOI   ScienceOn
7 MacLeod, D., The office ergonomics kit, Lewis Publishers, 1999
8 McAtamney, L. and Corlett, E. N., RULA: a survey method for the investigation of work-related upper limb disorders, Applied Ergonomics, 24(2), 91-99, 1993   DOI   ScienceOn
9 이인석, 관절동작 불편도에 근거한 심물리학적 자세부하 평가 모 델, 박사학위논문, 포항공과대학교, 2002
10 기도형, 외부부하, 상지자세와 지속 시간에 따른 지각불편도, 대한 산업공학회지, 30(2), 76-83, 2004
11 박용주, 외부부하가 부과된 어깨 자세의 심물리학적 불편도 평가, 석사학위논문, 포항공과대학교, 2004
12 최동식, 박성준, 정의승, 최재호, 상체의 자세 변화에 따른 외부부 하에 대한 불편도 영향 평가, 대한인간공학회지, 23(4), 45-56, 2004
13 Armstrong, T. J., Upper-extremity postures: definition, measurement and control, In E. N. Corlett, J. Wilson, I. Manenica(Ed), The ergonomics of working postures, Taylor & Francis, London, 1986
14 Armstrong, T., Punnett, L. and Ketner, P., Subjective worker assessment of hand tools used in automobile assembly, American Industrial Hygiene Association Journal, 50, 639-645, 1989   DOI   ScienceOn