A laboratory simulation of self-paced and force-paced industrial stacking and palletizing tasks.
Mital-A; Karwowski-W; Chalaka-AK
J Hum Ergol 1987 Jun; 16(1):31-41
The demands and responses of force paced and self paced material handling (stacking/palletizing) tasks were investigated with particular attention given to determining if the existing, forced pace was acceptable physiologically and psychophysically and what pace would be selected by the individuals if given a choice. Seventeen men and ten women untrained in manual palletizing and stacking tasks voluntarily participated in the study. The results indicated that the force paced task was quite demanding for women who on the average operated at about 42 percent of their aerobic capacity. Their heart rates were also very high. The men, however, performed at levels which could be comfortably sustained for 8 hours, approximately 28 percent of their aerobic capacity. When given the choice of work pacing, the subjects chose to perform at even higher levels. The reasons for this appeared to lie in the subjective estimation of fatigue and overestimation of one's own capabilities. Even after adjusting responses for self paced tasks for overestimation, males were operating at about 45 percent of their aerobic capacity and females at 54 percent of theirs. The authors conclude that if individuals were allowed to work at their own pace for palletizing and stacking tasks, the individuals would most likely work themselves into excessive physiological fatigue. The rate of the conveyor belt carrying containers, which was often set at six containers per minute, was not psychophysically too strenuous for either men or women, but was excessively demanding, physiologically, for women. If women were to maintain this level of activity, more frequent rest breaks would be needed to avoid excessive fatigue and over exertion.
NIOSH-Publication; NIOSH-Grant; Grants-other; Physiological-response; Physical-exercise; Muscle-physiology; Physiological-fatigue; Psychological-fatigue; Materials-handling
Mechanical and Industrial Engr University of Cincinnati Dept of Mec & Indus Engrg Cincinnati, OH 45221
Other Occupational Concerns; Grants-other
Journal of Human Ergology
University of Cincinnati, Cincinnati, Ohio