Effect of ergonomic engineering innovation on musculoskeletal symptoms during mining heavy load handling in Chile
Palabras clave:
occupational health, musculoskeletal disorders, ergonomic workstation, occupational risksResumen
Introduction: Ergonomics is essential for preventing work-related musculoskeletal disorders, particularly in physically demanding sectors such as mining. In Chile, tasks involving overexertion and awkward postures significantly increase ergonomic risk. Engineering controls have shown effectiveness in reducing physical workload and improving occupational health.
Objective. To evaluate the effectiveness of an engineering control applied to the replacement of a variable frequency drive (VFD) in reducing ergonomic risks and musculoskeletal symptoms among mining workers.
Methods: A mixed, cross-sectional experimental study was conducted with 15 mining workers. Ergonomic risk and musculoskeletal symptoms were assessed using the Technical Guide for Manual Load Handling, the Standardized Nordic Questionnaire, and the Borg CR-10 Scale. The intervention consisted of implementing a mechanical arm with a hoist to assist VFD handling, comparing pre- and post-intervention conditions.
Results: Before the intervention, handling the VFD (30–45 kg) required asymmetric postures and high physical effort, resulting in musculoskeletal pain, mainly in the lower back (66.7%) and shoulders (26.7%), with perceived exertion rated as very strong (7). After the intervention, pain decreased significantly (lower back 6.6%, shoulders 0%; p<0.05), and perceived exertion was reduced to very weak.
Conclusion: The engineering control effectively reduced physical load, exertion, and musculoskeletal symptoms in mining workers.
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Derechos de autor 2026 Alejandro Nicolás Galleguillos Rodríguez, Miguel Ángel Pérez Lizama, Alejandra Elizabeth Pezoa Ahumada, Karla Andrea Hernández Pérez, Boris Alberto Gary Zambra, Gabriela Paz Urrejola Contreras
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