Computer simulations of actual human-work interface interactions, once developed, are less expensive and easier to modify than conducting the actual tests. Due to the successful applications of these virtual human models, efforts are under way to develop such models for generic applications. Unfortunately, there are important issues that need to be addressed before developing such generic models. The purpose of this paper is to address these issues by discussing the analysis of a large sample of dynamic strength of multiple joints. A poor correlation was observed between joint strengths in subjects who fell between the 25th and 75th percentile range. Virtual human modeling may thus be most accurate in predicting an individual's strength capabilities when he or she is either clearly weak or clearly strong.
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