Modelling parameters of biodynamic structure of a flight part of the Tkachev exercise of complex coordinationon a horizontal bar

The technique of gymnastic exercises is a subject of a competitive judgment, therefore considerable time in the training process is given to technicaltraining. The technique is constantly improved and changed, becoming more rational. Nowadays a modern basis of research oftechniques of gymnastic exercises, its profound analysis and perfection are biomechanics methods. For the analysis, updating and perfectionof exercises techniques the following means are applied: video recording of exercises; an experimental-analytical method ofdefinition of geometry of weights of a body of the person; computer processing of video data of registration of movements of sportsmenand construction of visible records of exercises on the computer; analytical and numerical methods of calculation of kinematic and dynamiccharacteristics of investigated exercises on the computer, construction of models of techniques, and also the kinematic and dynamicanalysis of its structure. As a result of the biomechanical analysis of techniques of gymnastic exercises on the basis of the receiveddata on techniques parameters there is a possibility of constructing both the reference model of techniques of the investigatedexercise, and the individual model for a certain gymnast. And the techniques of the investigated exercises received as a result of thebiomechanical analysis parameters are a reference point for trainers and sportsmen. Exercises with the expressed flight phase exist inmany kinds of sport, in particular, in artistic gymnastics. The given structural group of gymnastic exercises is obligatory on a gymnasticapparatus (bars, parallel bars, etc.); it is also highly estimated by judges. In modern gymnastics it is considered that for faster and qualitativesportsmen's studying and mastering the techniques of over flight exercises it is necessary not only to have a high level of physicaland technical readiness, but also to know the modelling parameters on its kinematic and to dynamic characteristics (the starting positionof the body weight centre on axis Ox; the final position of the body weight centre on axis Ox; the starting and final position of the bodyweight centre on axis Oy; the maximum of lifting of the body weight centre on axis Oy concerning support; the resultant speed of thebody weight centre on axis Oy, and etc.), definition of which is the purpose of our research. The biomechanical analysis of the techniquesof bend-unbend movements in the joints of the gymnast executed in the flight period of the Tkachev exercise allows making thefollowing resume on kinematics and noting its modelling parameters: 1. Transition from the basic part of the exercise in the flight part iscarried out by the early active counter tempo movement, that is by a short loss of contact with the bars. It is necessary to provide atimely performance of requirements to amplitude and speed of the counter rotation in the flight part of the exercise. 2. During the flightpart of the exercise, the bend-unbend movements in joints have an uncoordinated character - the bend movements of feet incoxofemoral joints are carried out more slowly, than in the humeral ones. It is necessary that the gymnast remained absolutely directlonger in flight, which is highly estimated by judges of competitions. 3. In the article the modelling parameters characterizing the flightpart of the exercise, which have been defined during our research, are also presented.

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