Kinematics And Kinetics Analysis Of Crawl Style Turning Skill In Shandong Province

Objective: This study was designed to Shandong Province freestyle swimming 10 athletes(athlete)turn to test the effectiveness by comparison and analysis,which preliminary biomechanical indicators(standardized peak force determined impulse,the knee bending angle,and 15 meters turn the)turned on the technical effect of the total time available.And then turned on the province's outstanding technical freestyle athletes were analyzed,Shandong Province freestyle athletes targeted training provides a theoretical basis,and lay a solid foundation for improving technology turned the province athletes.Methods: In this study,10 female freestyle for elite athletes as test subjects,utilizing the latest introduction of the Swiss turned kistler special force platform,four high-speed cameras,three placed in the water,a water Adventist placed on athlete turned the whole process for simultaneous testing and acquisition.Using an 8-channel component board and a DAQ system consisting of BIOWARE software collects data.Being different stages of turn around time,body posture,body weight standardized peak force,sliding distance,butterfly Leg times and other indicators of kinematics and dynamics,analysis and comparison research,combined with research,analysis completion freestyle athletes turned technology.Results: Shandong competitive swimmer since turning technology exists before the last stage of Tour turned not accelerate,tuck tight enough,slow roll,knee and hip angle and push off when small,the maximum value of the normalized peak force of kicking off small,kicking off the process of correction,underwater gliding distance is short,the number of small dolphin kick,kick the legs butterfly leg strength is uneven,and the largest butterfly leg knee flexion instability and other issues.In conclusion: 1.Data are presented as descriptive statistics,using Pearson's correlation and linear regression analysis of reasoning,All indexes turned Effect of a great relationship.2.Shandong Province outstanding freestyle athletes swim into the wall before turning to accelerated phase or even reduce swimming speed.3.Since the waist and abdominal strength is not enough athletes themselves do not have enough speed plus support group itself is not cause athletes Tight slow problem.4.Because athletes can be trained to master appropriate for itself,started to roll with the head turned to the pool Effective from the walls,from the turn after turn athletes too close or too far from the wall,feet touch the wall and turned to the final buffer Position of the knee hip extension is not enough,body posture and push off after the incorrect leg muscle explosive athlete Insufficient force,kicking off a small force.5.Athletes overall coherent enough to turn technical movements,kicking off a long buffer time,after kicking off straddle,butterfly kick out of sync,etc.,affect the overall push off effect.