Volume 11, Issue 2 (6-2021)
J Health Saf Work 2021, 11(2): 196-212 |
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Ebrahimi M, Azgahini M R, Nazari J, Safiyan A R. Assessment of Shoulder and Lower Back Muscles Activities of Carpet Weaver’s in the Traditional and Ergonomic Workstations Using Electromyography. J Health Saf Work 2021; 11 (2) :196-212
URL: http://jhsw.tums.ac.ir/article-1-6497-en.html
URL: http://jhsw.tums.ac.ir/article-1-6497-en.html
1- School of health, Tabriz University of Medical Sciences, Tabriz, Iran
2- Department of Biomechanical Engineering, Faculty of biomedical Engineering Sahand University of Technology
3- School of health, Tabriz University of Medical Sciences, Tabriz, Iran , nazari_j@yahoo.com
4- Department of Biostatistics and Epidemiology, Tabriz University of Medical Sciences, Tabriz, Iran
2- Department of Biomechanical Engineering, Faculty of biomedical Engineering Sahand University of Technology
3- School of health, Tabriz University of Medical Sciences, Tabriz, Iran , nazari_j@yahoo.com
4- Department of Biostatistics and Epidemiology, Tabriz University of Medical Sciences, Tabriz, Iran
Abstract: (1553 Views)
Introduction: Carpet-weaving is one of the hard and harmful jobs, which affect the health of the workforce. Based on the previously conducted research, musculoskeletal disorders in the neck, shoulder, and lower back regions are common among carpet weavers. This study conducted to investigate the muscle activity of the shoulder and lower back regions in carpet weavers during work on traditional and ergonomic workstations by surface electromyography.
Material and Methods: 18 experienced male weavers with a mean age of 38 and mean weaving experience of 11.1 years participated in this study. Each weaver took part in two trails of 120 min. Surface EMG signal recordings were done during weaving for four muscles (bilaterally in trapezius and erector spine). The RMS and MPF values were extracted from the raw EMG signal to estimate muscle activity and fatigue.
Results: The results obtained from the 5-time intervals indicated the lowered MPF in the ergonomic workstation compared to the traditional one. The result of the mean RMS in most of the recorded times was lower in the ergonomic workstation than that in the traditional one.
Conclusion: According to the results of the study, the modified workstation was well-suited for trapezius muscles, and the traditional one had an advantage for the erector spine muscles.
Material and Methods: 18 experienced male weavers with a mean age of 38 and mean weaving experience of 11.1 years participated in this study. Each weaver took part in two trails of 120 min. Surface EMG signal recordings were done during weaving for four muscles (bilaterally in trapezius and erector spine). The RMS and MPF values were extracted from the raw EMG signal to estimate muscle activity and fatigue.
Results: The results obtained from the 5-time intervals indicated the lowered MPF in the ergonomic workstation compared to the traditional one. The result of the mean RMS in most of the recorded times was lower in the ergonomic workstation than that in the traditional one.
Conclusion: According to the results of the study, the modified workstation was well-suited for trapezius muscles, and the traditional one had an advantage for the erector spine muscles.
Type of Study: Research |
Received: 2021/06/12 | Accepted: 2021/06/12 | Published: 2021/06/12
Received: 2021/06/12 | Accepted: 2021/06/12 | Published: 2021/06/12
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