Ergonomic Risk Assessment of Lifting Activities; a Case Study in a Rubber Industry


Roghayeh Abedini 1 , Alireza Choobineh 2 , Ahmad Soltanzadeh 3 , * , Milad Gholami 4 , Fatemeh Amiri 1 , Amir Almasi Hashyani 4

1 Department of Engineering Occupational Health and Student Research Committee, Shiraz University of Medical Sciences, Shiraz, IR Iran

2 Department of Ergonomics and Research Center for Health Sciences, Shiraz University of Medical Sciences, Shiraz, IR Iran

3 Student Research Committee, Shiraz University of Medical Sciences, Shiraz, Iran/ scholarship of Qom University of Medical Sciences, Qom, Iran

4 Department of Epidemiology, Arak University of Medical Sciences, Arak, IR Iran

How to Cite: Abedini R, Choobineh A, Soltanzadeh A, Gholami M, Amiri F, et al. Ergonomic Risk Assessment of Lifting Activities; a Case Study in a Rubber Industry, Jundishapur J Health Sci. 2013 ; 5(1):e93993.


Jundishapur Journal of Health Sciences: 5 (1); e93993
Published Online: March 21, 2013
Article Type: Research Article
Received: May 18, 2019
Accepted: March 21, 2013




Introduction: Manual material handling is identified as one of the musculoskeletal disorders risk factors. The aims of this study were to evaluate lifting activities by NIOSH equation and MAC method and the correlation of these two methods.

Methods and Materials: This cross-sectional study was conducted in a rubber industry. Studied subjects were 136 male workers selected from various sections by proportional-to size sampling method. Data were collected using demographic and Nordic Musculoskeletal Disorders Questionnaire (NMQ). Lifting activities were evaluated by NIOSH equation and MAC method. Statistical analyses were performed using SPSS, version 16 and some tests such as Independent sample t test, Chi-square (χ2 ) and Bland-Atman test. The level of significance was set at <5%.

Results: The means of age and job tenure in subjects were 33.31±6.48 and 9.77±6.17 years, respectively. Prevalence of MSDs was 77.2%. The results revealed significant association between MSDs risk level evaluated by NIOSH and MAC methods and musculoskeletal disorders occurrence. The correlation of the two lifting activity evaluation methods was significant (p<0.05).

Conclusions: Based on the findings of the present study, the evaluated risk level by the two evaluation methods and prevalence of MSDshad significant relationship. The correlation result indicated that MAC method can be used interchangeably with NIOSH equation for ergonomic evaluation of lifting activities.


Musculoskeletal disorders (MSDs) Ergonomic evaluation of lifting activity NIOSH equation MAC MSDs risk

© 2013, Jundishapur Journal of Health Sciences. This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License ( which permits copy and redistribute the material just in noncommercial usages, provided the original work is properly cited.


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