Variation in spinal load and trunk dynamics during repeated lifting exertions

Objectives. To quantify the variability in lifting motions, trunk moments, and spinal loads associated with repeated lifting exertions and to identify workplace factors that influence the biomechanical variability. Design. Measurement of trunk dynamics, moments and muscle activities were used as inputs into EMG assisted model of spinal loading. Background. Traditional biomechanical models assume repeated performance of a lifting task produces...