The purpose of this investigation was to develop a procedure for the computation of the dynamic parameters used in the description of human locomotion. The subject was filmed while running across a force platform to obtain lower limb position data. The lower limb was modeled as a two-dimensional system of articulating rigid linkages and the angular velocities, angular accelerations and the external joint forces and moments were calculated for each segment.

The force reactions at the three joints revealei little attenuation of forces in the vertical direction. Of the three joints, the greatest anterior/posterior forces were recorded at the hip. The moment reaction at the three joints indicated that in braking phase, peak moments were daserved in the hip and knee while during propulsion stage, the ankle and hip moments achieve dominance.