Effects of a Proximity-Sensing Feedback Chair on Head, Shoulder, and Trunk Postures When Working at a Visual Display Terminal

Author： Yoo Won-gyu Yi Chung-hwi Kim Min-hee

Publisher： Springer Publishing Company

ISSN： 1053-0487

Source： Journal of Occupational Rehabilitation, Vol.16, Iss.4, 2006-12, pp. : 631-637

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Abstract

Introduction: This study was designed to identify the effects of feedback from a proximity-sensing chair on head, shoulder, and trunk postures when working at a visual display terminal (VDT). Methods: Twenty healthy adults were asked to perform VDT work, and their forward head, forward shoulder, and trunk flexion angles were analyzed using a 3-D motion analysis system. The statistical significance of differences between without and with an auditory feedback device was tested by paired t-tests, with the significance cutoff set at α=0.05. Results: The forward head, forward shoulder, and trunk flexion angles significantly decreased during VDT work when using the proximity sensor with auditory feedback. Conclusion: We suggest that a feedback device promotes the adoption of beneficial postures, which may be effective in preventing VDT-work-related neck and upper-limb disorders.