A COMPREHENSIVE STUDY ON THE BODY STRAIGHTENED DISMOUNT WITH 3 TURN ON THE HORIZONTAL BAR

Abstract

The Stretched Salto with 1080 º Turn to Dismount on Horizontal Bar is a most difficult kind of movement. It has not been seen in Olympic Games or the World Championships. However, Xie Bo, and elite Gymnast in Shandong, accomplished this movement successfully in National Gymnastic Championships in 1992 and was awarded the first prize for original movement. The measuring method with high speed photography has been adopted to follow his traces to record the movement and make a biomechanical analysis so as to form a contrast between the relative parameters of a 1080 º stretched turn in acrobatic gymnastics and a 720 º stretched turn on the horizontal bar. It has been found that the giant swing on the horizontal bar is the technical key to finishing this movement successfully. The giant swing of high quality needs a projecting speed of no less than 5.56mJs for the human body. The best point of losing grip is 10 cm below the body centre of gravity in horizontal plane. When losing grip, the flight angle of the centre of gravity is 8 1º- 83 º to create better rotation in the air. With the biomechanical analysis of this item, the technical key of this movement, the condition of losing grip and basic kinematic parameters were first revealed. In order to put forward this movement to the world, this study sets a precedent and lays a solid foundation for training and teaching in future.