1976 Volume 20 Issue 6 Pages 339-352
In order to find certain suggestions for improvements in performances in vaulting stunts and in its skill instruction, kicking and hand-push actions of selected side-horse vaulting stunts were studied by use of cinematographical analysis technique. Ten college gymnasts volunteered as sujects who performed squat vault, handspring vault and front somersault vault for picture taking. Upon analyzing projected pictures, the center of gravity movements were traced, from which vector analyses of kicking and hand-push actions were attempted. The outcomes included the followings: 1. No single technical and / or mechanical premises to decide the successful performance were found. The execusion in one of the premises, such as preceding run, kick and hand-push would be compensated in other premises, and hence, the total performance would not be ruled by one. 2. Satisfactory speed in preceding run to be carried over to kicking action and smoothness in the last step of the run would provide effective pre-flight. 3. Sharp kick and hand-push actions with short duration of time would provide effective pre- and post-flights, respectively. 4. The kicking for take-off is generally directed to down-backward, while the hand-push, to down-forward. 5. Forward rotartory move of the trunk in rotatory vaulting stunts is generally produced by fast preceding run followed by a down-backward kick, while the center of gravity trajectory would not be so different between rotatory and non-rotatory stunts. 6. In the case of non-rotatory stunts, the trunk starts to rotate forward in the first half of the performance, though such rotation is reversed in the latter half, by wiggling the hips and up-lifting swinging of the arms.