Effect of a Wrist Motion Storage Biofeedback System (WMSBS) on Wrist Motion during Keyboard Typing Work

[Purpose] The purpose of this study was to examine the effect of a wrist motion storage biofeedback system on wrist range of motion during keyboard typing work. [Subjects] For this study, we recruited 10 computer workers as volunteers. [Methods] Wrist flexion, extension, ulnar deviation, and radial deviation angles were analyzed using a 3-D motion analysis system. [Results] The wrist flexion, extension, ulnar deviation, and radial deviation angles decreased significantly in keyboard typing work with the wrist motion storage biofeedback system. [Conclusion] We suggest that the wrist motion storage biofeedback system promotes the adoption of a beneficial wrist posture, which may be effective at preventing computer work-related wrist disorders, such as carpal tunnel syndrome.