B7 ジャベリックスローにおけるターボジャブの投射初期条件に関する研究(運動のダイナミクス)

Abstract

The "turbo-jav" is used in the javelic throw as an introduction to the javelin throw or as a technical tool with which to practice the javelin throw. The present study investigated the flight characteristics of the turbo-jav. The javelic throws of 50 junior high school and university students were measured. Each thrower was videotaped using two high-speed video cameras during while throwing the turbo-jav. Each condition of release of the turbo-jav was measured using the 3-dimensional DLT method. The results revealed a significant positive correlation between initial velocity and throwing distance in the javelic throw. A comparison of turbo-jav and javelin throws indicated that the throwing distance was not small even when the angle of attack is large. When the turbo-jav is thrown, the actual throwing distance is smaller than the theoretical throwing distance without air. In other words, the flight characteristics indicate that the flight of the turbo-jav in the javelic throw differs from that of a thrown javelin.