Investigating the Relationship Between the Risk of Psychosocial Factors and Grip Fatigue of Employees with Manual Tasks

Mahdavi, Neda; Faradmal, Javad; Dianat, Iman; khotanlou, Hassan; Haidari Moghadam, Rashid

doi:10.30699/jergon.8.3.48

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Volume 8, Issue 3 (Iranian Journal of Ergonomics 2020) Iran J Ergon 2020, 8(3): 48-58 | Back to browse issues page

‎ 10.30699/jergon.8.3.48

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Mahdavi N, Faradmal J, Dianat I, khotanlou H, Haidari Moghadam R. Investigating the Relationship Between the Risk of Psychosocial Factors and Grip Fatigue of Employees with Manual Tasks. Iran J Ergon 2020; 8 (3) :48-58
URL: http://journal.iehfs.ir/article-1-731-en.html

Investigating the Relationship Between the Risk of Psychosocial Factors and Grip Fatigue of Employees with Manual Tasks

Neda Mahdavi¹

, Javad Faradmal²

, Iman Dianat³

, Hassan Khotanlou⁴

, Rashid Haidari Moghadam ^*

⁵

1- Department of Ergonomics, School of Public Health and Research Center for Health Sciences, Hamadan university of Medical Sciences, Hamadan, Iran
2- Hamadan University of medical sciencesDepartment of Biostatistics, School of Public Health and Research Center for Health Sciences, Hamadan university of Medical Sciences, Hamadan, Iran
3- Department of Occupational Health and Ergonomics, Faculty of Health, Tabriz University of Medical Sciences, Tabriz, Iran
4- Department of Computer Engineering, Bu-Ali Sina University, Hamedan, Iran
5- Department of Ergonomics, School of Public Health and Research Center for Health Sciences, Hamadan university of Medical Sciences, Hamadan, Iran , Dr_haidari@yahoo.com

Abstract: (6142 Views)

Backgrond and Aim: Fatigue is a common and highly prevalent problem among workers. Muscle fatigue is the result of general fatigue that is caused by different risk factors. This research was conducted to assess grip fatigue between workers with manual tasks and its relationship to psychosocial risk factors.
Methods: In this study, Jamar hydraulic dynamometer was used to investigate the decrease in the production of grip force or grip fatigue. The grip force of 157 subjects in three job levels that met inclusion criteria recorded, three times in an 8 hours shift. The psychosocial risk factors were also assessed using the Copenhagen psychosocial questionnaire and their relationship with grip force and grip fatigue was analyzed.
Results: sixty-one percent, 62%, and 69% of employees in light, medium, and heavy tasks, respectively, experienced grip fatigue in the second phase of the study. It seems that as the power/speed increased and the tasks became more difficult, employees experienced more grip fatigue in the right hand. The declining trend of grip force and the increase in grip fatigue was more evident in heavy task jobs. No moderate or strong correlation was observed between the psychosocial risk factors and grip fatigue.
Conclusion: Because the nature of worker tasks in heavy manual tasks required more force exertion, they experienced more grip fatigue in their right hand than other workers. It is not possible to draw definitive conclusions about the impact of psychosocial risk factors on grip fatigue. Investigating the impact of cognitive loads and anthropometric dimensions on grip fatigue can be an interesting topic for future studies.

Keywords: Grip Fatigue, Grip Force, Manual tasks, Psychosocial Risk Factors, Copenhagen questionnaire

Full-Text [PDF 597 kb] (9509 Downloads) | | Extended Abstract (HTML) (1473 Views)

Type of Study: Research |
Received: 2020/05/28 | Accepted: 2020/08/27 | ePublished: 2020/09/22

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