Rotating Shot Technology

Shot putting is a throwing event, with strength as its base and speed as its core.The moving track of shotutting is a paradola,which follows the mechanics theOry of oblique putting moving. According to this moving equation: know there are three factors which affect the score of shot putting.They are the initial velocity(v),the throwing angle(a) and the height(h) of putting.Among those, v is the most principal factor because it gathers all the accelerating strength that the atheletic movement affects the shot.So how to improve the initial velocity becomes the key to the question during the process of shot putting. Skill evolution has changed from the most primitive padding shot putting into crossranging sliding shot putting, then into the semibackacing sliding shot putting and backacing sliding shot putting,and now into the situation of backacing sliding shot putting and the rotational shot putting exist tripatitely. From this change,we can easily see that the initial velocity is always the principal reason which promotes the technological innovation and the improvement of shot putting. In this point, the trends of shot technique are lengthening the acting distance before you put the shot and improving the moving speed of sliding.Tracing to he improvement history of shot technique,we can see the trend was single, that is to say , the imatitiori and the improvement mixed and existed together before l970s.And the imatition and the improvement of the spotsmans shot technique followed its mechanics theory unconscientionsly. In 1980s, the sportsman could make the shot technique conform to its mechanism more conscientionsly and initiatively .They also find the suitable shot technique which suits to themselves. In this way , shot technique should not only conform to the principal reason of its improvement and evolution but also find the suitable technique which comes with the sportsmans individual character. These are important factors which affect the improvement of shot technique. Backacing sliding shot putting and rotational shot putting are the most two disputed technique styles. They have different features, but both created over 22ms wonderful scores. At present, there are many disputes at home and abroad about which style is better and more suitable to the mechanism of shot event. There are lack of thorough reseach about the rotational shot putting and the literatures and the experiments about it are also few. Because of this, the paper sets forth the present significance in the field of shot putting evolution of rotation. Furhtermore, through the comparison with backacing sliding shot putting, we made a synthetical evaluation about rotational shot putting on the view of biomechanics. On the basis of theory, we also made a comparative teaching experiment in two freshmans classes. We adopted calculating statics, testing and comparative analysis during the experiment .The result proves that rotation is better than back facing sliding shot putting at the same time and in the same condition .Therefore, we can introduce the rotation technique to our physical education teaching and training in order to improve the quanlitv of shot event and get more excellent achievement.