Background: In developing countries, construction is a largely manual job that imposes awkward postures on workers, thus facilitating a variety of musculoskeletal disorders. Ergonomic training is known as an effective way to reduce these disorders.
Objective: This study aimed to evaluate the effectiveness of ergonomic training intervention in reducing the ergonomic risk of concrete form workers.
Methods: This quasi-experimental study was carried out on 144 concrete form workers employed in the construction projects of Gonbad-e Kāvus, Iran, Iran. Data was collected using the Nordic Musculoskeletal Questionnaire (at the pre-intervention stage) and the Rapid Entire Body Assessment (REBA) worksheet (at the pre- and post-intervention stages). Ergonomic training was provided via face-to-face educational meetings along with presenting informative pamphlets, which took place over 45 days duration of time. Data were analyzed by the use of SPSS software version 21, t-test and Wilcoxon test. Significant level was considered at P-value less than 0.05.
Results: Musculoskeletal disorders were observed in all limbs of the studied workers. The most prevalent disorders were the pain in the shoulder region of lift operators (86.1%) and the pain in the back area of mixer operators (77.8%). About 99.3% of all concrete form workers were exposed to a moderate level of ergonomic risk and needed posture correction. Pre- and post-training REBA scores showed a statistically significant difference (P < 0.05).
Conclusion: Although the ergonomic training did reduce the ergonomic risk of workers, because of its short duration, it failed to reduce this risk to an acceptable level. It is recommended to hold both theoretical and practical training sessions over longer periods of time.
Keywords: Work-related musculoskeletal disorders; construction; ergonomic training; rapid entire body assessment.