PNF and Movement 2021; 19(2): 243-250
An Observational Study of Office Workers’ Postural Behaviors During Computer Work
Deok-Hoon Jun, P.T., Ph.D.⋅Mi-Ran Goo, P.T., Ph.D.1†
Department of Rehabilitaion and health promotion, Daegu University
1Industry-University Cooperation Foundation, Silla University
Correspondence to: Mi-Ran Goo (
Received: July 25, 2021; Revised: August 3, 2021; Accepted: August 3, 2021; Published online: August 31, 2021.
© Korea Proprioceptive Neuromuscular Facilitation Association. All rights reserved.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Purpose: The purpose of this study was to observe office workers’ postural behaviors during computer work to identify the risk factors for head and thorax postural behaviors.
Methods: The participants included 57 office workers who worked longer than 20 hours on a computer. Postural behaviors during computer work were measured using 3-D wearable motion sensors on the forehead and sternum. A multivariate linear regression model evaluated the association between various risk factors (neck pain, demographics, and environmental factors) and non-head and thorax postural behaviors.
Results: The participants maintained their head and thorax in neutral postures (defined as 10° extension∼10° flexion and 5° extension∼10° flexion, respectively) for 24.7% and 39.3% of the total recorded time. Those who reported neck pain at the measurement of postural behaviors showed less time spent in thorax postures. Current neck pain, high desk height, and the distance between the keyboard and the edge of the desk (cm) were found to be related to less time spent in a neutral thorax posture.
Conclusion: Office environment factors and current neck pain might affect workers’ thorax postures, which might also determine the orientation of head postures during computer work.
Keywords: Neck pain, Computer posture, Risk factors, Ergonomics

This Article