Models for predicting maximum acceptable weight of lift and heart rate and oxygen uptake at that weight

Abstract

This paper presents a model to predict maximum weights of lift acceptable to male and female industrial workers for various lengths of shift duration. The individual worker's body size and strength profile and job descriptors are used to determine what weight can be lifted comfortably for regular, long and extra-long workshifts. In addition, prediction models are also presented to determine heart rate and oxygen uptake of the individual at the maximum acceptable weight of lift. These physiological response prediction models provide an estimate of the demands imposed upon the cardiopulmonary system of the individual while lifting subjectively acceptable weights. Knowledge of these physiological responses is helpful in determining the necessary rest allowances for fatigue. Together, the three prediction models provide a more comprehensive means of estimating an individual's lifting capacity and task difficulty.