Abstract
The purpose – to develop and experimentally substantiate the method of developing the physical qualities of tennis players aged 12–13 years old, using React Balls and stretching.
 Material and methods. The experiment was attended by 28 tennis players 12-13 years old sport school № 3, Severodonetsk, who were divided into control and experimental group of 14 people. The study was conducted within 8 months from August 2018 to March 2019. Before and after the experiment, tennis players' physical fitness was tested (shuttle run 6x8 m, push-ups 30 s, jumps with skipping-rope, running 6 m, running 30 m, long jump from the spot, throwing ball 1 kg, torso inclination forward from a sitting position, circular rotations in the shoulder joint with a gymnastic stick).
 Results. Complexes of exercises with React Balls and stretch exercises for all muscle groups were developed and introduced into the training process of young tennis players. A significant (p<0.05) increase in the flexibility indicators of athletes from the experimental group, as a result of the use of stretch exercises, was determined. It was revealed that doing exercises with React Balls and tennis balls significantly (p <0.05) increased the level of speed and coordination capabilities in the control and experimental groups. According to the test results «running 30 m», «circular rotations in the shoulder joint with a gymnastic stick», «torso inclination forward from a sitting position» in the experimental group, these figures are significantly higher compared with the athletes of the control group.
 Conclusions. It was shown that the use of stretching exercises contributes to the development of greater amplitude of movements, and also forms motor freedom, which affects the development of coordination and speed of movement of a tennis player. It is recommended to use the method of development of physical qualities using React Balls and stretching balls in the training process of young tennis players 12-13 years old.
Highlights
The purpose – to develop and experimentally substantiate the method of developing the physical qualities of tennis players aged 12– 13 years old, using React Balls and stretching
Of particular process of young tennis players 5-6 years old, in importance for an athlete is the success of learning particular, the specifics of the use of pedagogical applied motor skills and skills, and the formation of control to assess the level of development of technique
When using such a system, it is to develop high coordination abilities, strength components of a whole, that is, the development of abilities, speed abilities physical fitness is determined by the interrelation of
Summary
The purpose – to develop and experimentally substantiate the method of developing the physical qualities of tennis players aged 12– 13 years old, using React Balls and stretching. It is recommended to use the method of development of physical qualities using React Balls and stretching balls in the training process of young tennis players 12-13 years old. Розроблено і впроваджено в тренувальний процес юних тенісистів комплекси вправ з реактивних м'ячів і стретчингу для всіх груп м'язів. The number of studies functionality (especially the function of the visual aimed at the development and improvement of the analyzer), intelligence abilities [2] From this it physical qualities of young tennis players is limited. Follows that the process of training qualified athletes is an urgent task of the entire coaching corps
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