INFLUENCE OF ELASTIC CHARACTERISTICS OF SUPPORT ON THE WAVE PROCESS OF ENERGY TRANSFER FROM ONE LINK OF THE ATHLETE’S BODY TO ANOTHER

Abstract

INTRODUCTION: The established fact of energy transmission from one link of the athlete’s body to another during movement [3, 4] has never been connected with the processes of its interaction with supports differing in their resilient characteristics. The aim of this work is to establish the above-mentioned connection using a theory we have developed of wave processes of energy transmission in the athlete’s movements [1, 2]. METHODS: We use a multi-link model. Two links of the model are conjugated by a joint and connected by a non-linear element simulating muscle. The non-linear element contains a contractile element (CE), a consecutive elastic component (coefficient of elasticity C1), a parallel elastic component (coefficient of elasticity C2) and a damping element. Strength manifested by the contractile component of the muscle is described as a Hausse impulse:{}220max2/)(expbttFf−−=, where Fmax = maximal strength of ÑÝ, t0 = moment in time corresponding to Fmax, 2b = full pulse duration. The lower end of one link touches the elastic support with the coefficient of elasticity C0. The quantity of energy brought into the system ‘two links - non-linear element’ was examined, as well as the quantity of energy transferred to the following links.