Assessment of video display workstation set up on risk factors associated with the development of low back and neck discomfort

摘要

Approximately 33% of visual display terminal (VDT) operators report back and neck pain annually. As a result, a number of "ergonomic" chairs have been developed ranging the price spectrum. The objectives of this study were to (1) assess the effects of monitor height and chair type on low back and neck muscle activity, perceived level of discomfort (PLD), and posture shifts; and (2) determine if chairs at opposing ends of their price spectrum differ in the physiological benefits. Two levels of monitor height and chair type were assessed. The findings of this research indicate that the interaction of monitor height and chair type significantly affects the loads placed on the human body. Task demands also play an important role in the loads placed on the body, posture fixity, and level of discomfort reported. Therefore, the location of VDT equipment and chair selection should be based on task demands to minimize static loading and discomfort. In general, no gross physiological differences were identified between high and low cost chairs, again supporting the recommendation that chair selection be based on task demands. Relevance to industry: This research assesses differences in high and low cost ergonomic chairs as they relate to physiological responses of the back and neck and user perceived discomfort. This information can be used to guide organizations in the purchase of office equipment.