Research On The Influence Of Resistance Push Sled Training On Sprint Acceleration Running Technique

Research Objective: to explore the influence of 8-week resistance push sleigh training on the formation and development of sprint acceleration technology by means of training experiment,high-speed camera and image analysis.to provide new ideas and methods for the training of sprint acceleration and speed ability,and to provide reference for more in-depth research on horizontal resistance training in sprint.Research methods: Eleven sprinters at level 3 to 2 were selected as the experimental subjects,and the resistance sled running training experiment was carried out 3 times a week for 8 weeks.The changes of physical quality,overall and limb kinematics indexes of sprinters before and after the experiment were analyzed by kinematic test analysis and mathematical statistics.Research conclusion:1.After resistance sled running training,athletes’ performance in the 10 m,30m,60 m and standing long jump significantly improved,while there was no significant change in the 100 m performance.The resistance sled running practice has a good improvement on the athletes’ starting and accelerating ability,but has no significant impact on the 100 meter back distance.2.After resistance sled running training,the horizontal velocity of the center of gravity at the moment the athlete pedals off the starting device is greater,and the forward inclination angle of the body is smaller,but there is no significant impact on the kinematic characteristics of the hip,knee,and ankle when pedaling off the leg.Therefore,this exercise mainly improves the ability of the lower limbs,with a small impact on starting techniques.3.Due to the prior resistance,resistance sled running exercises have a more positive effect on the development of stride frequency,but there are certain restrictions on the development of stride length.When using this exercise method,coaches must consider cooperating with appropriate stride length development exercises.4.The resistance sled running training system optimizes the overall kinematics indexes of the first to fourth steps of the acceleration run: the forward inclination angle and single step time in the post-test show a decreasing trend;The step length is reduced,but the shorter support and take-off time make the step frequency significantly improved,which is helpful to improve the horizontal speed of the body center of gravity in the acceleration stage faster,and realize the reasonable optimization of the overall technology of the acceleration run.5.The resistance sled pushing training has a positive impact on the kinematics index of the hip in the support stage of the acceleration run: the hip of the support leg and the hip of the swing leg show a greater range of motion and angular speed,effectively improving the shearing and twisting speed of the two thighs,and better meeting the need to rely on fast frequency to improve the speed in the acceleration stage.6.Resistance sled pushing training has a positive impact on the kinematic indicators of the knee and ankle during the support stage of accelerated running: the smaller knee and ankle angles of the support legs during the entire support stage enable athletes to demonstrate better "low position" support ability;The smaller knee angle and ankle angle of the swing leg in the whole support stage reduces the rotational inertia of the swing leg,prevents the active deficiency of the rear group muscles of the big and small legs,and improves the forward swing speed of the swing leg.