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
- 2020.8
- 수록면
- 333 - 343 (11page)
- DOI
- 10.5143/JESK.2020.39.4.333
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초록· 키워드
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Objective: The purpose of this study is to evaluate the workload in the posture of raising the arm above the shoulder, which is the cause of musculoskeletal disorders.
Background: The modern industrial structure is becoming automation due to the development of science and technology. However, many works in the manufacturing sector such as the shipbuilding industry, heavy industry, and automobile assembly are still working in the posture of raising the arm above the shoulder for a long time. Muscle fatigue from these works can be lead to severe symptoms such as musculoskeletal disorders over time.
Method: Seven healthy males without musculoskeletal disorders participated in the experiment. We measured the muscle activity of the deltoid muscle, trapezius muscle, and biceps according to changes in the angle of arm and weight in the posture of raising the arm above the shoulder. In addition, fatigue measures included subjective discomfort ratings through the Borg"s CR-10 scale. ANOVA was used to analyze the influence of the angle of arm and weight.
Results: ANOVA showed that the weight factors of the deltoid muscle, trapezius muscle, and biceps were statistically significant on EMG and subjective discomfort. In addition, only the arm angle factors of the deltoid muscle, except the trapezius muscle and biceps, were statistically significant on EMG and subjective discomfort. When we measured the EMG and subjective discomfort according to each muscle part in the posture of raising the arm above the shoulder, it was found that the deltoid muscle had the highest workload.
Conclusion: In this study, muscle activity and subjective discomfort were measured according to changes in the angle of arm and weight in the posture of raising the arm above the shoulder. It was found that the average value of %MVC and Borg"s scale were the highest on the deltoid muscle. This result means that a deltoid muscle could be easily exposed to musculoskeletal disorders than trapezius muscle and biceps. Further research should be conducted considering the characteristics such as working time, gender, and age.
Application: These results can contribute to preventing musculoskeletal disorders and improving work efficiency at industrial sites, and can be used as basic data for research on the upper extremity.
Background: The modern industrial structure is becoming automation due to the development of science and technology. However, many works in the manufacturing sector such as the shipbuilding industry, heavy industry, and automobile assembly are still working in the posture of raising the arm above the shoulder for a long time. Muscle fatigue from these works can be lead to severe symptoms such as musculoskeletal disorders over time.
Method: Seven healthy males without musculoskeletal disorders participated in the experiment. We measured the muscle activity of the deltoid muscle, trapezius muscle, and biceps according to changes in the angle of arm and weight in the posture of raising the arm above the shoulder. In addition, fatigue measures included subjective discomfort ratings through the Borg"s CR-10 scale. ANOVA was used to analyze the influence of the angle of arm and weight.
Results: ANOVA showed that the weight factors of the deltoid muscle, trapezius muscle, and biceps were statistically significant on EMG and subjective discomfort. In addition, only the arm angle factors of the deltoid muscle, except the trapezius muscle and biceps, were statistically significant on EMG and subjective discomfort. When we measured the EMG and subjective discomfort according to each muscle part in the posture of raising the arm above the shoulder, it was found that the deltoid muscle had the highest workload.
Conclusion: In this study, muscle activity and subjective discomfort were measured according to changes in the angle of arm and weight in the posture of raising the arm above the shoulder. It was found that the average value of %MVC and Borg"s scale were the highest on the deltoid muscle. This result means that a deltoid muscle could be easily exposed to musculoskeletal disorders than trapezius muscle and biceps. Further research should be conducted considering the characteristics such as working time, gender, and age.
Application: These results can contribute to preventing musculoskeletal disorders and improving work efficiency at industrial sites, and can be used as basic data for research on the upper extremity.
목차
1. Introduction
2. Method
3. Results
4. Conclusion
References
참고문헌 (15)
참고문헌 신청
Hagberg, M. / 1981 / Muscular endurance and surface electromyogram in isometric and dynamic exercise / Journal of Applied Physiology 51(1):1~7
정현욱 / 2002 / 정적인 자세에서 목 근육의 작업부하 평가
Jeong, M. K. / 1997 / Biomechanical and Postural Analysis of Machine Repair Tasks with Relatively High Complaints of Low Back Pain / Journal of the Ergonomics Society of Korea 16(3):49~60
Kim, C. H. / 2000 / A study on work-related musculoskeletal disorders in automobile factory operators: Part I / Papers of the Spring Conference of the Ergonomics Society of Korea
Kim, M.J. / 2018 / Effects of Humeral Position and Shoulder Flexion Angle on Activity of the Shoulder Muscles
정현욱 / 2002 / 정적인 자세에서 목 근육의 작업부하 평가
Jeong, M. K. / 1997 / Biomechanical and Postural Analysis of Machine Repair Tasks with Relatively High Complaints of Low Back Pain / Journal of the Ergonomics Society of Korea 16(3):49~60
Kim, C. H. / 2000 / A study on work-related musculoskeletal disorders in automobile factory operators: Part I / Papers of the Spring Conference of the Ergonomics Society of Korea
Kim, M.J. / 2018 / Effects of Humeral Position and Shoulder Flexion Angle on Activity of the Shoulder Muscles
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