The relationship of key force and keystroke rate with right arm musculoskeletal discomfort and fatigue was examined in 43 video display terminal (VDT) workers. These workers were all women who served as data transcribers and who had vocational school backgrounds. The numeric keypad of a VDT was used to enter numeric data from simulated tax forms; the subjects used their right hand to perform this task. A compression load cell placed under the '7' key was used to monitor peak key force. Lower key forces were associated with higher ratings of right hand discomfort. Both lower key forces and keystroke rates were associated with higher ratings of right elbow discomfort, accounting for 24% of the variance in this model. A significant correlation existed between fatigue and right shoulder discomfort and right elbow discomfort. No significant relationship between fatigue and right hand discomfort was noted. A significant negative correlation was noted between keystroke rate and musculoskeletal discomfort for some of the work periods at the end of the day. Throughout the work day there were negative correlations between key force and musculoskeletal discomfort for many periods of time. There was a correspondence between the cumulative increase in fatigue and musculoskeletal discomfort across the workday. The authors stress the need for further laboratory and field studies to clarify the direction and extent of the cause and effect relationship between biomechanical factors and musculoskeletal discomfort in this industry.
We take your privacy seriously. You can review and change the way we collect information below.
These cookies allow us to count visits and traffic sources so we can measure and improve the performance of our site. They help us to know which pages are the most and least popular and see how visitors move around the site. All information these cookies collect is aggregated and therefore anonymous. If you do not allow these cookies we will not know when you have visited our site, and will not be able to monitor its performance.
Cookies used to make website functionality more relevant to you. These cookies perform functions like remembering presentation options or choices and, in some cases, delivery of web content that based on self-identified area of interests.
Cookies used to track the effectiveness of CDC public health campaigns through clickthrough data.
Cookies used to enable you to share pages and content that you find interesting on CDC.gov through third party social networking and other websites. These cookies may also be used for advertising purposes by these third parties.