The study on the softball pitching to focus on the trajectory in the game of a university boy

Abstract

The aim of this study was to clarify the characteristics of softball pitching by measuring and analyzing the trajectory of softball pitched in the game. In two games of softball league, the trajectories of pitched balls were recorded by using two video cameras. And they were analyzed from the video data by a three-dimensional direct liner transformation method. As a result, most of the pitchers threw balls of different kinds with different the ball velocity and the variation of trajectories, which were similar to baseball pitching techniques. In addition, although pitchers who did not clearly change the ball trajectory were seen, the pitching balls of many pitchers changed vertically downward. It is thought that the ability to respond to the vertical variation of pitched ball is required for the batter because the vertical variation of trajectories during pitching of each pitcher showed characteristics, in the softball.