Cinematic characteristics of technique gyaku-zuki no jion kata do karatê style shotokan

摘要

The study examined kinematic characteristics of the technique gyaku-zuki the first sequence of the kata jion karate Shotokan style. Participated kataístas 10, female, purple belt, brown and black, with participation in at least one state competition. A simulation of kata competition in which the judges evaluated and rated the performance of the athletes was held. We used a registration form, and kinematics system with Xsens MVN inertial central Studio. Variables of the technical profile of athletes (undergraduate, workout time, frequency of weekly training, level of competitions which he participated, and position in the state ranking) and kinematic variables: runtime, maximum linear speed and average linear acceleration. To characterize the technical profile of the athletes and the kinematic variables: descriptive statistics; for comparisons between the two groups according to performance in the execution of the first sequence of the kata jion (Group 1: 1st to 5th position, and Group 2: 6th to 10th position): Student t test. The confidence interval was of 95% (p<0.05). Results: a) the kata athletes have technical profile consistent with good result played by them in competitions; b) the athletes in Group 1 performed the technique gyaku-zuki in less time (0,375s), higher values ??of maximum speed (10,51m/s) and mean acceleration (4,94m/s2) compared to Group 2 (0.503 s, 5,75m/s, 2.38M/s2, respectively). There were significant differences in all kinematic variables. We conclude that the athletes in Group 1 had better performance in the execution of technical gyaku-zuki, can be attributed to technical profile of athletes.