Increase of efficiency of athletes-sprinters' preparation by use of special exercisesof cyclic nature with marked asymmetry of power impact

The aimof this article is to substantiate methods of application of specialized exercises in the athletes-sprinters' preparation. These exercises arethe use of the asymmetric effects of force with weight on one leg in speed running. In cyclic exercises of maximum intensity,modification of the local effects of force by adding extra weight to legs radically changes the biomechanism of the flapping links in thecreation of the forces, which move the athlete's body while pushing. Due to these movements, which are consistent with the functioningof the main parts of the body, the power of non-core muscles and the intensity of the selected exercises increase. And eventually itwould lead to higher training effect. The principal difference from the classical examples of the application of burdens on both legsconsists in the fact that the use of the asymmetric effects of force allows you to do the exercises with greater frequency of movements.Using multiple repetition of high-speed running with asymmetrical effects of force in the form of weight on one leg in the trainingprocess, you can avoid the speed stabilization and the emergence of the ''high-speed barrier''. The functional ability of the athlete cannotadapt to this exercise fully due to the difficulties of conditions. However, it improves the special power training in the natural conditionsof the competition exercises. The proposed technique in the running allows changing the ratio of the length and frequency of runningstep in the overall structure of the movements by intensification of the power component with a constant speed of movement. In general,this method will allow increasing the sports performance at the expense of simultaneous increasing of both the indicators of runningspeed: frequency and length of the step. The analysis of the data received as a result of the pedagogical experiment indicates that thetechnique with using an asymmetry of power impact (running and special cyclic speed-power exercises with weights in the form ofsleeves (250-300 g) at the distal ends of the one leg's shin) in the preparation of women-runners for short distances provides the growthof the running speed, mainly, by increasing the length of the running step and, to a lesser extent, the frequency of step.

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