Controlling physical motions interference effect and use of itsregularities in technical training of athletes

The paper deals with the mechanismfor application of control physical motions in the athlete's joints in the point of dividing the phase composition of a sports exercise and itsbiomechanical effect on the formation of the trajectory of the athlete's body parts. The series of calculation experiments on the computershow that the increase of amplitude behaviour of software control at different phases of the exercise result in an inadequate biomechanicaleffect of the exercise final stage and its power support, which should be accounted for in the technical training of athletes. The mechanismfor application of control physical motions in the athlete's joints in the point of dividing the phase composition of a sports exercise and itsbiomechanical effect on the formation of the trajectory of the athlete's body parts has not been carefully considered by science, which is,first, due to to the deficient biomechanical research methods. The videos of exercises and their biomechanical analysis cannot give thenecessary and exhaustive information on the influence of kinematic changes of program control on the formation of the trajectory of thebiomechanical system. The practical realization of the idea of simulation of human motions on the computer made it possible to constructvarious forms of athlete's movements in the experiment (Zagrevsky V.I., 1994, Zagrevsky O.I., 2000, Zagrevsky V.I., Lavshuk D.A.,Zagrevsky O.I., 2000). This allowed solving the problem of a differentiable variation of program control with the following research ofvariations effect on kinematic and dynamic changes in the biomechanical state of the object. To disclose the mechanisms of influence oftime and amplitude range of the interference of program control on the trajectory of the biomechanical system and changes in the powersupport of exercise performance, a series of computational experiments on the computer, simulating the performance of the supporting partof the Tkachev flight exercise at the recession and recovery phases were made. Their results have revealed the patterns of change in thebiomechanical condition of the athlete at the time of transition from the support position to the support-free state due to the kinematicvariation of program control, and connected with the change of its amplitude parameters. What was impossible to identify in a naturalexperiment became possible to determine in computational experiments based on the idea of simulation of human motion on the computer.The results of the studies are recommended for practical use in the training process of athletes.

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