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The validity of a previously published model for calculating segmental and total body volume was investigated in 57 females (X age = 24.9 years). The model calculated total body volume correlated r = .96 with actual total body volume. For segmental extremity volumes validity coefficients ranges from r = .52 (forearm) to r = .88 (calf), (SEE = ± 6.4 to 14.5 percent of the mean). Significant mean differences (p < .01) were present between actual and calculated extremity volumes (except for upper arm). A significant difference (p < .01) for the regression of calculated versus criterion total body volume was found between males and females suggesting sexual dimorphism in segment shapes and volumes.