Proposta de um sistema para avaliação biomecânica de atletas de taekwondo

Abstract

The Taekwondo is an antique and traditional Korean martial art often used in personal defense, which in the past few years has been considered an Olympic sport. The Taekwondo is known as the ability of using hands and feet in high speed and amplitude scams in direction to the head and to the chest. Currently the Biomechanics has been used as a way to prevent injuries and improve the performance of athletes. The Biomechanics studies the athlete controls and compensates movement s patterns. And it is also possible to perform more functional evaluations of athletes through observation of parameters. These parameters can indicate, for example, the performance of the proprioceptive system, articular stability and muscle strength during specific movements. This research aims to develop a biomechanical analysis through the correlation between muscle activity and kinematic analysis of movements performed by the Taekwondo athletes in a more objective way. For that, during the trainings, biomechanical parameters will be obtained through a movement analysis system based on infrared cameras and reflexive markers. Synchronously, the electromyography activity of the muscles will be collected using wireless electrodes to allowing the athlete s movement freely. For this, it was developed software and synchronism systems to analyze muscle activity to each movement registered by system cameras. To that muscle activity behavior were analyzed, including the fatigue, the concentration of blood lactate were detected via portable device. The data obtained by this system were analyzed by statistical tools and were investigated biomechanical parameters that better assist in the analysis of the movements. It is emphasized that, in this study, the results of each athletes were not compared to results of another athletes, because each one has a different pattern of movement. With the result noted that, despite the difficulties in obtaining information from dynamic contractions, it is possible to detect fatigue by analyzing the parameters obtained by these systems. And the fatigue cause, in the majority cases is consequence of the wrong movements or techniques executed by athletes. We believe that this system can be used for study another\'s sports or another biomechanical analysis.