Study Of Two Kind Of Technology Movements Of The Shot-putter's Right Leg Operating Characteristics Kinematics,Dynamics Comparison

Back gliding shot put technique is adopted by most athletes nowadays. Therefore, there are a lot of researches at home and abroad. But most of the studies are of a qualitative research and three-dimensional research and analysis. Along with the improvement of scientific research methods, it is difficult to reveal the characteristics of movement and throwing arm enforce power only by three-dimensional analysis. In this paper, we adopted method of three-dimensional photograph, three- dimensional-testing force platform to study the techniques of the right lower (kinematics analysis of right lower after back gliding)with two or near a level shot putters in the experiment, in which we combined the kinematics and dynamics to study their techniques. In the research, we found that, when jump shot in the end of one's right foot from the ground to the process, the performance characteristics of the movement is that the right rotation angle didn't change significantly, there was no leg to leg movement or form, mainly to direct lateral leg strength; The brace throws technology in this process was that, the right rotation angle was not obvious, and change was too small(due to the limited competitive level).The right foot rotation instantaneous presents the peak value, which was nearly similar with forcibly way of the brace throws. The research provides references for amateur or professional athletes close to the right leg movement characteristics, and provides the reference suggestion for the sports teaching and the extra-curricular training.Through after sliding step had finished, the right leg operating characteristics in the kinematics and dynamics aspect's research analysis, the findings indicated:(1) The research confirmed that after the shot-putter disliked slides step had finished, right leg operating characteristics by straight pedal (or side pedal) primarily.(2) The brace throws with the jump shot difference lies in: The brace throws the technical right lower limb rotation scope to be bigger than the jump shot technology slightly; The brace throws the technical right lower limb function to excel in the jump shot slightly in the ground time.Two kind of technical existence's insufficiency is: The right lower limb moves ahead insufficiently, and the action time is short.(3) Proposed initially delivers the right lower limb, after forward the pedal extends forcibly the right leg work shape. In light of these conclusions, hoping to training and teaching to provide useful reference. And recommendations:(1) Through the research, promotes around the left leg landing, about the right foot forward motion 30 centimeters, may cause the human body center-of-gravity position like this (markup, two thigh included angles changes highly) is small, the human body center of gravity approaches the left leg, the easy center of gravity to move ahead.(2) Around the left leg is well-grounded, the right foot moves ahead rapidly supports the pedal, raises athlete's right foot pedal instantaneous fast effort, enables right flank the body to make an effort fully.(3) Maintains the health athletics level, develops the lower limb strength fast effort ability; Enhances the malleolus joint's strength, the rotational speed and is well-grounded the instantaneous movement speed; Improves lower limb's flexibility and the coordination, does some instantaneous accelerates to run the practice; Strengthens the right foot instant to erupt the biggest strength the practice; The reduced lower limb joint's attrition, reduces the possibility which is injured.