Working Posture and Upper Trapezius Myofascial Pain Syndrome: A Cross-Sectional Study

Abstract

Introduction: Poor working posture is widely recognized as a potential risk factor for musculoskeletal disorders among office workers, particularly those engaged in prolonged computer use. One of the most commonly reported conditions is myofascial pain syndrome (MPS), especially affecting the upper trapezius muscle. Despite this, the relationship between working posture and MPS remains inconsistent across studies.
Objective: This study aimed to determine the relationship between working posture and the incidence of upper trapezius myofascial pain syndrome among office workers.
Methods: A cross-sectional analytical study was conducted among employees at the Faculty of Medicine, Udayana University, between October 28 and December 6, 2024. A total of 61 participants aged 30–50 years who met the inclusion and exclusion criteria were recruited using purposive sampling. Working posture was assessed using the Rapid Upper Limb Assessment (RULA). The diagnosis of MPS was confirmed through flat palpation performed by a physiotherapist, while pain intensity was measured using the Numeric Rating Scale (NRS). Data were analyzed using Spearman’s rho correlation test.
Results: The findings showed no significant correlation between working posture and the incidence of MPS. On the right side, the correlation coefficient was r = –0.112 with a p-value of 0.392, while on the left side, r = –0.026 with a p-value of 0.842 (p > 0.05). These results suggest that working posture alone may not significantly influence the occurrence of upper trapezius MPS.
Conclusion: There was no significant association between working posture and upper trapezius myofascial pain syndrome among office workers.