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
- 2019.8
- 수록면
- 335 - 346 (12page)
- DOI
- 10.5143/JESK.2019.38.4.335
이용수
초록· 키워드
오류제보하기
Objective: The aim of this study is to evaluate the postural load of blueberryharvesting tasks based on continuous observation of working postures and measurement of wrist angles with electronic goniometers.
Background: Agricultural workers are known to be highly exposed to various risk factors of musculoskeletal disorders. The blueberry-harvesting workers have to carry out the repetitive manual tasks for a long time in a very hot summer season. Their work has not yet been studied sufficiently for us to understand the postural load of the tasks based on quantitative and objective data.
Method: Four female workers were video-recorded while they are carrying out their normal work of blue-berry harvesting. Their tasks were categorized as 3 subtasks of pricking, storing, and miscellaneous. The working postures were continuously observed and categorized according to the postural classification based on REBA using a computer S/W program, CAPTIV. The estimated working time a day for each subtask, the percentage for the categorized working postures of lower arm, upper arm, neck, trunk, and leg, and the mean and maximum sustained times for each posture were analyzed. Their wrist angles were measured using electronic goniometers while they were carrying out their normal work. The positions, movements, and frequencies of the wrist motions were analyzed.
Results: It was shown that the workers spent 82% of their working time on picking, with 11.9 sec and 45.0 sec of mean and maximum sustaining time of picking. They took mild or severe bending postures in their trunk for 55.7% of the working time and mild bending in the neck for 50.2% of the working time. They elevated their arms to the shoulder height for more than 60% of the working time, and 11.4% and 26.7% of the working time for squat sitting and unbalanced standing, respectively. The maximum sustaining times for mild and severe bending for the trunk are 56.9 sec and 37.3 sec, respectively, and 72.9 sec, 56.0 sec, and 46.6 sec for the mild bending of neck, severe arm elevation, and squat sitting, respectively. It was found that the workers mostly assumed extended wrist postures, though the workload on the wrist seemed to be moderate according to the positions, movements, and frequencies of wrist flexion/extension and deviations, as compared to previous studies of other repetitive work.
Conclusion: It was shown that the workers have to carry out the picking tasks in the most time. They took non-neutral postures in the trunk, arms, legs and neck for the most of the working time. It can be resumed that the workers are very highly exposed to the risks of musculoskeletal disorders.
Application: The results of this study can be used as a basic and practical data for the study for preventing musculoskeletal disorders of blueberry-harvesting workers.
Background: Agricultural workers are known to be highly exposed to various risk factors of musculoskeletal disorders. The blueberry-harvesting workers have to carry out the repetitive manual tasks for a long time in a very hot summer season. Their work has not yet been studied sufficiently for us to understand the postural load of the tasks based on quantitative and objective data.
Method: Four female workers were video-recorded while they are carrying out their normal work of blue-berry harvesting. Their tasks were categorized as 3 subtasks of pricking, storing, and miscellaneous. The working postures were continuously observed and categorized according to the postural classification based on REBA using a computer S/W program, CAPTIV. The estimated working time a day for each subtask, the percentage for the categorized working postures of lower arm, upper arm, neck, trunk, and leg, and the mean and maximum sustained times for each posture were analyzed. Their wrist angles were measured using electronic goniometers while they were carrying out their normal work. The positions, movements, and frequencies of the wrist motions were analyzed.
Results: It was shown that the workers spent 82% of their working time on picking, with 11.9 sec and 45.0 sec of mean and maximum sustaining time of picking. They took mild or severe bending postures in their trunk for 55.7% of the working time and mild bending in the neck for 50.2% of the working time. They elevated their arms to the shoulder height for more than 60% of the working time, and 11.4% and 26.7% of the working time for squat sitting and unbalanced standing, respectively. The maximum sustaining times for mild and severe bending for the trunk are 56.9 sec and 37.3 sec, respectively, and 72.9 sec, 56.0 sec, and 46.6 sec for the mild bending of neck, severe arm elevation, and squat sitting, respectively. It was found that the workers mostly assumed extended wrist postures, though the workload on the wrist seemed to be moderate according to the positions, movements, and frequencies of wrist flexion/extension and deviations, as compared to previous studies of other repetitive work.
Conclusion: It was shown that the workers have to carry out the picking tasks in the most time. They took non-neutral postures in the trunk, arms, legs and neck for the most of the working time. It can be resumed that the workers are very highly exposed to the risks of musculoskeletal disorders.
Application: The results of this study can be used as a basic and practical data for the study for preventing musculoskeletal disorders of blueberry-harvesting workers.
목차
1. Introduction
2. Method
3. Results
4. Discussion
5. Conclusion
References
참고문헌 (20)
참고문헌 신청
Chen, H. C. / 2010 / Ergonomic risk factors for the wrists of hairdressers / Applied Ergonomics 41:98~105
Estill, F. C. / 1998 / Ergonomic Considerations of Manually Harvesting Maine Wild Blueberries / Journal of Agricultural Safety and Health 4(1):43~57
Hansson, G. Å. / 1996 / Goniometer measurement and computer analysis of wrist angles and movements applied to occupational repetitive work / J. Electromyography and Kinesiology 6:23~35
Hignett, S. / 2000 / Rapid entire body assessment (REBA) / Applied Ergonomics 31:201~205
Jin, S. E. / 2009 / Biomechanical evaluation of postures assumed when harvesting from bush crops / International Journal of Industrial Ergonomics 39:347~352
Estill, F. C. / 1998 / Ergonomic Considerations of Manually Harvesting Maine Wild Blueberries / Journal of Agricultural Safety and Health 4(1):43~57
Hansson, G. Å. / 1996 / Goniometer measurement and computer analysis of wrist angles and movements applied to occupational repetitive work / J. Electromyography and Kinesiology 6:23~35
Hignett, S. / 2000 / Rapid entire body assessment (REBA) / Applied Ergonomics 31:201~205
Jin, S. E. / 2009 / Biomechanical evaluation of postures assumed when harvesting from bush crops / International Journal of Industrial Ergonomics 39:347~352
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