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Updated: Jul 19, 2026
A Vibrotactile Feedback Device for Seated Balance Assessment and Training
Published on: January 20, 2019
Effects of a proximity-sensing feedback chair on head, shoulder, and trunk postures when working at a visual display
Won-gyu Yoo1, Chung-hwi Yi, Min-hee Kim
1Department of Rehabilitation Therapy, The Graduate School, Yonsei University, 134 Shinchon-dong, Seodaemun-gu, Seoul, 120-752 Republic of Korea. won@yonsei.ac.kr
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 alpha=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.
