Abstract
Biomechanical models of the trunk may be useful in ergonomic design of equipment, workstations, manual materials handing situation and clinical evaluation. Recently a trunk load analysis method was proposed by Schultz and Andersson (1981). This method was incorporated into a linear programming model to predict the action of the trunk under sagitally symmetric lifting condition. An experiment was performed where twenty male and female subjects were tested under sagitally symmetric isometric and isokinetic lifting condition. Intramuscular electromyographic recordings of the trunk musculature and intra-abdominal pressure measurements were compared with model predictions. The strong and weak points of the analysis method are discussed.
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