Identification of distinctive biomechanical features of the technique of side hand strike at close range of athletes of different qualifications specializing in hand-tohand combat

This research deals with identifying the distinctive features of the technique of side hand strike at close range of athletes with different qualifications specializing in hand-to-hand combat. The pedagogical experiment (in the laboratory conditions) involved 10 qualified and 4 highly qualified athletes specializing in hand-to-hand combat. The research used "Qualisys Motion Capture" method for registration and analysis of athletes' movements. The research has established that athletes of high qualification have rather high coordination of inclusion of individual bio-links when performing a side hand strike at close range. At the same time, a slight advance of the maximum speed of the elbow joint at the time of a strike indicates the need for further work on the technique of masters of sports. Qualified athletes have significant reserves in this regard, namely: there is usually no preliminary phase associated with the movement of the pelvis and shoulder joint of the athlete who is striking back after taking the initial position (this phase is called swing); there is an inconsistent inclusion of individual bio-links in the work, as evidenced by the dynamics of changes in the resulting speed of individual bio-links. At the same time, it should also be noted that in the final phase of carrying the side of the striking bio-link (a few temporary moments before the strike) qualified athletes have a movement of the pelvis back, against the course of movement. As a result, the inclination of the torso relative to the vertical increases, which also leads to flexion in the right hip joint. Probably, the violation of the integrity and rigidity of the biomechanical system occurs before the moment of strike and leads to the fact that the links of qualified athletes specializing in hand-to-hand combat significantly lose speed.