Article

Computer use continues to be considered a risk factor for work-related
musculoskeletal disorders despite a greater awareness of the risk associated with
excessive use, the implementation of safety features and the introduction of
extensive interventional programs. Better understanding of risk factors in
movement patterns is needed. This study identified the most suitable variable for
work-related upper extremity motion analysis as being peak-to-peak range of
motion. Assessment was by three-dimensional motion analysis for upper extremity
ergonomics. The study was designed to validate and examine the reliability of
these parameters in the setting of keyboarding. Sixty-two right-hand dominant
participants (non-skilled typists) were recruited. Motion analysis was performed
using the Cartesian Optoelectronic Dynamic Anthropometric CX-1 (CODA) system with
markers which were attached to the right hand, elbow, wrist and fingers. Range of
motion and angular velocity were recorded while the subjects repeatedly typed a
predetermined sentence five times. The re-test examination was repeated after an
interval of one week. The findings clearly demonstrated discriminative validity
in wrist range of motion (p<.01), test-re-test, reliability (.83>ICC>.70) and
inter-rater reliability (.95>ICC>.70) for most variables. The CODA system has
considerable potential for understanding movement patterns in the upper
extremities. These findings can provide the basis for future studies on the
efficacy of ergonomic intervention programs.
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Langue : ANGLAIS