Research On The Characteristics Of Throwing Technical By Different Level Curling Athletes

ObjectiveThrowing is one of the most basic techniques of curling.It is a key factor in determining the outcome of curling.A solid and solid throwing action is a good basis for technical and tactical performance.In this regard,there are many problems for curling athletes in China.At home and abroad,more attention has been paid to the training and research of curling players' throwing movements.Related research shows that curling athletes' shooting speeds are roughly the same under different types of curling,and curling players' shoulder,elbow,and knee angles have fluctuations.However,domestic research has not discussed the influencing factors of the angle of shot throwing.Whether the angle,angular velocity,and acceleration of the curling player's joints are affected by the athlete's level under the same type of throwing is worth further discussion.Based on the independent development of the inertial sensing system,collect relevant data of athletes of different levels,analyze and study the test results,and analyze the technical performance of high-level athletes and ordinary athletes by combining video recordings to find out the curling athletes of different levels.The internal characteristics of the inter-throwing stage and its influence on the action of throwing the jug provide targeted training countermeasures and improvement suggestions for curling athletes and coaches.MethodIn this study,curling high-level athletes and ordinary athletes were taken as the research objects.Eight high-level athletes were recruited from Beijing Clockwise Curling Club,and eight ordinary athletes were recruited from Beijing Sport University of ice and snow sports majors and the Capital University of Physical Education and Sports.Athletes and 16 subjects were all males,excluding differences in the effects of gender factors on movement characteristics.The experiment uses a wireless sensor node(range 8g,accuracy 12 mg,sampling frequency up to 100KHz)to collect athlete joint acceleration and angular velocity data,using Basler PIA640-210 gc constant speed camera(resolution 1024 * 768 pixels,shooting frequency 50 frames / Sec)Video shooting of athletes throwing pots,and analysis of athletes' joint angles through the "Agon Data" data and video synchronous acquisition and analysis system.During the experiment,the wireless sensor nodes were fixed to the shoulder joint,elbow joint,wrist joint,hip joint,knee joint,and ankle joint of 12 joints on both sides of the subject.The subjects started from the pedal and unified theright foot as the pedal foot and the left The feet are sliding feet,holding the pot on the right,holding the brush on the left,and using the center of the camp as the target point,glide in a high position until the clockwise shot at the avant-garde line throws the pot,and throw the pot into the opposite camp circle to complete a test.Collect relevant mathematical data,and then use the "Agon Date" data processing software and Excel,SPSS 22.0 to perform independent sample T test on the data to find the significant relationship between joint motion and the level of the athletes at each pitching stage.Result(1)In the preparation stage,there are significant differences in curling athletes' left hip,left knee,left ankle and right elbow joints at different levels.The two groups of athletes held the kettlebell forward angle of 70 ° ~ 80 °,the kettlebell angle of150 ° ~ 170 °,the pedal knee angle of 40 ° ~ 50 °,the pedal ankle angle of 75 ° ~ 85 °,and the brush shoulder The abduction angle is 115 ° ~ 130 °,and the brush wrist angle is 150 ° ~ 170 °.(2)At the beginning of the pitching stage,there are significant differences in curling athletes' right elbow,wrist,ankle and left elbow,hip,knee,and ankle joints at different levels.The two groups of athletes held the kettlebell forward angle of 90 ° ~110 °,the kettlebell angle of 160 ° ~ 170 °,the pedal knee angle of 110 ° ~ 125 °,the pedal ankle angle of 100 ° ~ 125 °,and the brush shoulder The abduction angle is115 ° ~ 130 °,and the brush wrist angle is 160 ° ~ 170 °.(3)There are significant differences in the movements of the shoulder joints,hip joints,knee joints,and ankle joints of athletes at different levels during the sliding phase.The two groups of athletes held the kettlebell elbow angle of 150 ° ~ 165 °,the kettlebell arm angle was 130 ° ~ 145 °,the brush shoulder abduction angle was 140 °~ 155 °,and the brush wrist angle was 165 ° ~ 175 °.(4)During the shot phase,there are significant differences in the right shoulder,elbow,and wrist joints of curlers at different levels.Conclusions(1)The angular velocity characteristics of the knee joint can be used as the basis and means for the curling athletes to divide the stage of throwing movement.(2)Under the same throwing action,the overall change of joint angle,joint acceleration and joint angular velocity of high-level athletes is smaller than that of ordinary level athletes,and the pitching technique is more stable.(3)At the stage of preparation for pitching,the left hip,knee,ankle and right elbow joints of athletes of different levels are significantly different,and the balance and stability of high-level athletes' pitching preparation are good.(4)At the beginning of the pitching period,ordinary athletes lack the ability to push forward,swing backward and move pedals in a consistent manner and accumulate strength.Compared with high-level athletes,the movements of elbow,knee and ankle joints are significantly different.(5)In the sliding phase,high-level athletes are superior to ordinary-level athletes in the ability to control the center of gravity of the body,as well as the flexibility and stability of the shoulder joint,hip joint,knee joint,and ankle joint in sliding motion.(6)In the shot phase,the wrist angle and elbow joint angular velocity of high-level athletes are greater than that of ordinary level athletes.(7)The stage task characteristics of athletes of different levels throwing pots are:preparing for throwing pots—controlling the center of gravity of the body to maintain balance and stability;starting the throwing pots—maintaining continuity of movement and accumulating force;gliding phase—controlling the center of gravity,Give full play to the flexibility and stability of joints;the shot phase-appropriately increase the angle and speed of the shot.