The effects of psychosocial factors on trapezius muscle activity levels during computer use
Bruno Garza, J.L.
van Dieen, J.H.
van der Beek, A.J.
The goal of the present study, a part of the PROOF (Predicting Occupational biomechanics among OFfice workers) study, was to determine if there was a relationship between psychosocial stress, measured by reward and over-commitment, and trapezius muscle activity while workers performed their own computer work in the field. We observed that workers reporting higher levels of over-commitment and lower reward also experienced approximately 40% higher median trapeizus muscle activity levels than workers reporting lower levels of over-commitment and lower reward (change from 3.5% MVC to 6% MVC), with no difference in muscle activity for workers reporting high reward and either low or high overcommitment. Workers reporting higher levels of over-commitment experienced more variability in trapezius muscle activity. The results of this study may be used to inform interventions targeting reduction of musculoskeletal disorders among office workers.
To reference this document use:
WH - Work & Health
BSS - Behavioural and Societal Sciences
Work and Employment
Proceedings of the Human Factors and Ergonomics Society 56th Annual Meeting, HFES 2012, 22 October 2012 through 26 October 2012, Boston, MA, 1123-1127