A study has been conducted as an initial step in determining the differences observed between the motions of a living human impact sled test subject and a dummy test subject. The mechanism which is proposed for accomplishing this is the HSRI Two-Dimensional Mathematical Crash Victim Simulator. A series of measurements were taken on human test subjects, including classical and nonclassical anthropometric measurements, range of motion measurements for the joints, and maximum foot force measurements. A series of mathematical expressions has been used to predict body segment weight, centers of gravity, and moments of inertia using the results of the various body measurements. It was then possible to prepare a data set for use with the mathematical model. In addition to the body measurements described above, it was necessary to determine the deceleration profile for the Daisy sled and to determine the geometry as well as the force-deformation characteristics for the seat and restraint environment. This being accomplished, a computer simulation of an impact sled test involving a human volunteer was made. The results are presented to conclude the paper.