Abstract
Parameters describing trunk dynamics have been shown to be related to low back injury risk. The objective of this paper was to develop a relationship between static workplace variables and trunk kinematic variables. The independent variables considered in this study consisted of the inputs to the Revised NIOSH Lifting Equation. These include the beginning and ending asymmetry location (five levels), horizontal distance (two levels), vertical height (three levels), and weight (two levels). A three-dimensional electrogoniometer (the Lumbar Motion Monitor) was used to record the trunk kinematics as the subjects performed these varied lifts. Thirty subjects (15 male, 15 female) performed 96 lifts. From this data set a series of regression models were developed. The models enabled us to estimate the position, velocity, and acceleration of the low back in the coronal, sagittal, and transverse planes for a given set of lifting task parameters.
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