Abstract
The purpose of this study was to measure the wearing effect of sprint spikes by performing rebound jumping, keeping constant frequency and utilizing the single degree of freedom vibration model. Physical stiffness is one of the important factors in sprint races. In this study, the human body was considered as a vibration model constructed of mass and spring. The physical stiffness including sprint spikes was estimated from the ground reaction force by rebound jumping. The wearing effect was determined from the estimated stiffness and contact time of rebound jumping. Consequently, in the case of wearing long plate type spike shoes, the physical stiffness was bigger than bare foot condition significantly. Also it was possible to evaluate properties of spike shoes from scattering and correlation of the contact time.
