An equation to predict maximum acceptable loads for repetitive tasks based on duty cycle: evaluation with lifting and lowering tasks.
Recently, an equation was developed to predict maximal acceptable effort (MAE) for repetitive tasks based on the product of task frequency and effort duration (ie. duty cycle). This equation has been shown to closely match data from psychophysical studies of the upper extremities. In the current paper, the applicability of this equation was tested on lifting and lowering data from Snook and Ciriello (1991) and was found to fit closely, even at very low duty cycles.
Department of Kinesiology, McMaster University, 1280 Main Street West, Hamilton, Ontario, Canada. potvinj@mcmaster.ca
Jim R
JR
Potvin
D000465:Algorithms; D012090:Cumulative Trauma Disorders / Q000517:prevention & control; D006804:Ergonomics; D005260:Female; D006801:Humans; D017770:Lifting; D008297:Male; D015233:Models, Statistical; D060051:Occupational Injuries / Q000517:prevention & control; D005082:Physical Exertion; D034941:Upper Extremity; D016474:Weight-Bearing