Comparison of deformation and inner reflection by using various Large-sized balls for static and dynamic weight

Abstract

The purpose of this study was to obtain basic knowledge which was necessary for the coaching on the exercise using a Large-sized ball through the following two tasks. 1) The deformation of each a Large-sized ball was measured and compared when an adult man performed static and dynamic exercise tasks on 7 kinds of a Large-sized balls. 2) By using the characteristic a Large-sized balls that exhibited the largest and the smallest deformation, 10 adults performed the same exercise tasks on them; their inner reflection