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.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2019.6
- 수록면
- 231 - 242 (12page)
- DOI
- 10.5143/JESK.2019.38.3.231
이용수
초록· 키워드
오류제보하기
Objective: This study aims to investigate validity of perceived discomfort as postural load scale based on maximum holding time (MHT), and to develop two regression models for MHT and perceived discomfort depending varying postures and external load.
Background: Although many postural load-relevant studies were based on perceived discomfort, research dealing with validity of perceived discomfort as postural stress is seldom found.
Method: An experiment for measuring MHT and perceived discomfort according to various postures and external load was performed, in which hand position, trunk rotation and external load were used as independent variables. The hand position was determined by two relative parameters: the percentage of shoulder height (hand height) and the percentage of arm reach (hand distance). Eight healthy male graduate students without histories of musculoskeletal disorders participated in the experiment, whose demographic data were as follows: Age - 24.6 ± 1.75 years; Stature - 177.2 ± 3.12cm; Body weight - 70.3 ± 5.65kg; Shoulder height - 144.3 ± 3.52cm; and Arm reach - 73.5 ± 2.45cm.
Results: ANOVA showed that all the simple factors of hand height, hand distance, trunk rotation and external load were statistically significant on MHT and discomfort at α = 0.01. The effect of hand distance for MHT or that of external load for discomfort was much larger, compared to other independent variables. The MHT and discomfort was strongly inversely related, which suggested that discomfort can be used as postural load scale. Based on the experimental results, two regression models depending on postures and external load for MHT and discomfort were developed, which showed reasonably high R² values.
Application: The results of this study provided a reasonable ground on many existing studies based on discomfort as well as future researches adopting discomfort as postural stress scale.
Background: Although many postural load-relevant studies were based on perceived discomfort, research dealing with validity of perceived discomfort as postural stress is seldom found.
Method: An experiment for measuring MHT and perceived discomfort according to various postures and external load was performed, in which hand position, trunk rotation and external load were used as independent variables. The hand position was determined by two relative parameters: the percentage of shoulder height (hand height) and the percentage of arm reach (hand distance). Eight healthy male graduate students without histories of musculoskeletal disorders participated in the experiment, whose demographic data were as follows: Age - 24.6 ± 1.75 years; Stature - 177.2 ± 3.12cm; Body weight - 70.3 ± 5.65kg; Shoulder height - 144.3 ± 3.52cm; and Arm reach - 73.5 ± 2.45cm.
Results: ANOVA showed that all the simple factors of hand height, hand distance, trunk rotation and external load were statistically significant on MHT and discomfort at α = 0.01. The effect of hand distance for MHT or that of external load for discomfort was much larger, compared to other independent variables. The MHT and discomfort was strongly inversely related, which suggested that discomfort can be used as postural load scale. Based on the experimental results, two regression models depending on postures and external load for MHT and discomfort were developed, which showed reasonably high R² values.
Application: The results of this study provided a reasonable ground on many existing studies based on discomfort as well as future researches adopting discomfort as postural stress scale.
목차
1. Introduction
2. Method
3. Results
4. Discussion
5. Conclusion
References
참고문헌 (17)
참고문헌 신청
Armstrong, T. / 1989 / Subjective worker assessment of hand tools used in automobile assembly / American Industrial Hygiene Association Journal 50:639~645
Borg, G. / 1998 / Borg's perceived exertion and pain scales / Human Kinetics
Boussenna, M. / 1982 / The relation between discomfort and postural loading at the joints / Ergonomics 25(4):315~322
Chung, M. K. / 2003 / Assessment of postural load for lower limb postures based on perceived discomfort / International Journal of Industrial Ergonomics 31:17~32
Corlett, E. N. / 1980 / The effects and measurement of working postures / Applied Ergonomics 11:7~16
Borg, G. / 1998 / Borg's perceived exertion and pain scales / Human Kinetics
Boussenna, M. / 1982 / The relation between discomfort and postural loading at the joints / Ergonomics 25(4):315~322
Chung, M. K. / 2003 / Assessment of postural load for lower limb postures based on perceived discomfort / International Journal of Industrial Ergonomics 31:17~32
Corlett, E. N. / 1980 / The effects and measurement of working postures / Applied Ergonomics 11:7~16
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