Influence of Computer Keyboard Slope and Wrist Support Height on Users’ Discomfort

Abstract

Modern workplaces rely highly on computers, making ergonomic setups essential to prevent musculoskeletal disorders like carpal tunnel syndrome. This study examined the effects of keyboard slope (0° vs. -13°) and wrist support height (9.8 cm vs. 15 cm) on wrist comfort during typing. Ten university participants took part in the experiment.The study found that a flat keyboard slope of 0° with a wrist support height of 9.8 cm provides the most comfort for wrists and forearms. However, increasing the wrist support height to 15 cm significantly increases discomfort, particularly in the neck and shoulder. The negative slope of the keyboard reduces the extension of the wrist and increases pressure on the carpal tunnel, which is beneficial.These results indicated the necessity of individually adapted ergonomic settings regarding keyboard slope and wrist support height for optimal comfort while minimizing health risks. Such adjustments may help the user to reduce discomfort and minimize the possibility of MSDs. Further research might be directed toward investigating other slope and height combinations with effects calculated both based on surveys and EMG data, which would help create better ergonomic solutions for a variety of typing styles and working environments.

Keywords: Ergonomics, Musculoskeletal Disorders, Keyboard Slope, Wrist Support, Typing Posture, User Discomfort

DOI: 10.54941/ahfe1006472