An analysis of race walking styles using a 2-dimensional mathematical knee model

Describes a method developed to assess the contact forces in the knee due to different race walking techniques. Current rules require the walker's leg to be straightened upon impact with the ground, while previous rules allowed the leg to be bent until it passed beneath the walker's center of gravity. A system incorporating EMG, force plate readings, and kinematic video analysis was used in conjunction with a 2-D mathematical model of the lower leg. The model was developed to be applicable at initial impact. Significant differences were found between the two techniques in terms of the contact forces as well as accelerations of the tibia during impact.