Suppression for the Instability of Cardiac-Locomotor synchronization Cardiac by Musical Rhythm at Running

(Improving Running efficiency by Musical-Locomotor synchronization)

Abstract

It is known that a phenomenon in which a cardiac rhythm and a locomotor rhythm synchronization occurs during running. At these synchronizations, the cardiac rhythm rate increases in proportion to the locomotor rhythm intensity, and when it approaches the limit locomotor rhythm intensity, an unstable phenomenon of the cardiac rhythm increases becomes sometimes observed. This instability of the cardiac rhythm causes lower running efficiency, so it is necessary to keep the stable cardiac rhythm up to the faster locomotor rhythm as far as possible. It is known that the locomotor rhythm is synchronized with the musical rhythm. Therefore, we obtain a model with the musical-locomotor rhythm added to the van der Pol equation that expresses the cardiac rhythm, and we propose the musical-locomotor rhythm synchronization to suppress the instability of the cardiac rhythm for this model. By simulation, we show the musical-locomotor rhythm synchronization to suppress this instability.