Subject-based rating of hand-wrist stressors.
Subject-based rating (SBR) methods (eg, Borg Scales) have been applied to lifting and exertion estimation. SBR methods were applied to hand-wrist motions in this controlled experimental study of rapid motion. Seven normal volunteers performed lift actions with several combinations of wrist position (flexion-extension), repetition frequency, force, and grip type (precision vs power) using an experimental apparatus. Wrist position and frequency were confirmed using an electrogoniometer. Subjects rated the tasks along 5 scales. Analysis showed that grip type had the predominant effect on the subjective ratings, but the other factors were also rated. However, cycle times between 3 and 8 seconds were not well differentiated. The study indicates that SBR does validly reflect actual stressors and suggests that SBR may be useful for "screening" jobs for more intensive study.
Harber
P
P
Department of Medicine, School of Public Health, University of California-Los Angeles 90024-7027.
Hsu
P
P
Peña
L
L
D000328:Adult; D001696:Biomechanical Phenomena; D012090:Cumulative Trauma Disorders / Q000503:physiopathology* / Q000517:prevention & control; D006801:Humans; D007537:Isometric Contraction / Q000502:physiology; D008297:Male; D008875:Middle Aged; D009784:Occupational Diseases / Q000503:physiopathology* / Q000517:prevention & control; D005082:Physical Exertion / Q000502:physiology; D016059:Range of Motion, Articular / Q000502:physiology; D016474:Weight-Bearing / Q000502:physiology*; D014938:Work Capacity Evaluation; D014955:Wrist Joint / Q000503:physiopathology