Analysis Of Starting Data Parameters And Technical Characteristics Of Excellent Male Short-distance Freestyle Swimmer

Starting technique is an important part of today’s competitive swimming competitions.The quality of starting technique directly affects the athletes’ mental state and competition performance,and it is more prominent in short-distance freestyle competitions.By observing the performance of short-distance freestyle competitions in recent years,the starting technique is the weak link of its athletes.It is necessary to improve the deficiencies in the starting process of the athletes to help improve the starting technique level and competitive ability.This study analyzes the starting technique of short-distance freestyle athletes in terms of kinematics and dynamics,and takes the starting technique of outstanding male short-distance freestyle athletes as the research object.Using literature method,experiment method,image analysis method,mathematical statistics method and other methods to carry out research,through the high-speed camera underwater two-dimensional shooting and the Kistler departure force platform to obtain the kinematics and dynamics index data of the athletes at the 15 m stage of departure,the freestyle Diagnose and analyze the six stages of starting platform,leaving the platform,vacating,entering the water,gliding underwater,and exiting the water.At the same time,the Pearson correlation analysis method is used to analyze the part of the whole process of the outstanding male short-distance freestyle swimmers starting15 m The indicator data was analyzed and explored.and the following research conclusions were drawn:1.The kistler swimming technique analysis system used in this study has the advantages of strong operability,and the obtained kinematic technical index test results are highly accurate and stable.2.In the stage stage,the initial movement time of S1 athletes is relatively short,and the brain nerves respond strongly to external stimuli,but the angle of the rear knee joint is relatively small,which increases the stagnation time.Moving forward is beneficial for the body to quickly push off the starting platform,but the initial movement takes a long time.3.In the stage of leaving the platform,according to the force value impulse analysis,the connection difference between the S1 athlete’s hand leaving the platform and the rear pedal leaving the platform is analyzed.The S2 athlete’s body tilt angle is too large when leaving the platform,and he puts too much energy on the vertical force during the stage of leaving the platform,resulting in a low horizontal speed when leaving the platform.4.In the vacating stage,the trajectory of the S2 athlete first tilts forward and then flat throws.The vacating height is high and the vacating time is long.The trajectory of the S1 athlete is a forward and downward flat throwing motion,and the flight time is short.5.In the stage of entering the water,the entry angles of the two athletes are different from those of the world’s top athletes.The entry angle of the S1 athlete is relatively small,and the entry range is large,which increases the contact area with the water surface when entering the water and increases the frictional resistance.The entry angle of the S2 athlete is biased.Large,resulting in too deep into the water.6.In the underwater stage,the S2 athletes entered the water too deep,which caused the body’s angle of attack to be too large during the swimming process,and the shape resistance increased and decreased rapidly.S1 athletes have a fast speed in the underwater swimming stage,and the effect of kicking more times is ideal,continuing the speed of the water entry stage.7.In the stage of exiting the water,there are differences in the exiting distance of the two athletes.Compared with the world’s best athletes,the exiting distance of S1 is more reasonable,and the exiting distance of S2 is relatively short.