title: Demands on the back during maximal exertion.
abstract: Michigan-type computerized biomechanical models have the potential to predict hazard levels of exertion in many activities besides lifting. With suitable refinement, they could provide guidelines for non-lifting activities in a shorter term than can be expected from epidemiological and psychophysical studies. This paper examines some of the assumptions in the models, particularly as regards muscle action at joints. Observed features of whole symmetrical exertions are described which could be used for comparison with and validation of the simpler models before extending their use to production in the real-life conditions of asymmetrical exertions.
authors.affiliation: Biomechanics Laboratory, Royal Free Hospital School of Medicine, London NW3 2BQ, UK.
authors.forename: D W
authors.initials: DW
authors.lastname: Grieve