Abstract
A study was conducted to compare dynamic lifting task with a simulated static lifting task. 17 subjects 12 males and 5 females volunteered to participate in this study. The independent variables were the type of task (static and dynamic), frequency of lift (2, 4, and 6 lifts/min), and muscle group (back lift, leg lift, and arm lift). The psychophysical methodology was used in this study. The results showed highly significant differences between maximum acceptable static effort (MASE) and maximum acceptable dynamic effort (MADE) for both males and females. The frequency was also statistically significant. The muscle groups were significant for females and not significant for males. On the average MADE values were 45% of those of MASE values for females and 38% for males. The ratio of female to male data, on the average, were 39% for MASE values and 44% for MADE values. Regression models for the prediction of maximum of MADE from MASE and other task and worker variables were developed.
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