PhD, Associate Professor Konopleva A.N.
Kabardino‑Balkarian State University named after H.M. Berbekov, Nalchik

PhD, Associate Professor Kardanova E.V.
Kabardino‑Balkarian State University named after H.M. Berbekov, Nalchik

Gonokov A.R.
Kabardino‑Balkarian State University named after H.M. Berbekov, Nalchik

Keywords: volleyball players, speed-strength training, jumping ability, control machine.

Introduction. Jumping ability is the main component of jumping game activity in volleyball. Jumping ability is determined by two factors: muscle strength and the speed of muscle fiber contraction. Therefore, optimizing the means and methods of developing jumping ability in volleyball players and improving the effectiveness of their jumping training is always relevant [1].
The purpose of the study is to develop and experimentally substantiate the effectiveness of a technique for developing the jumping ability of volleyball players aged 13-14 using an inertial force control machine (IUV) developed by Yu. T. Cherkesov and his students).
Methodology and organization of research. Pedagogical research was organized on the basis of Kabardino‑Balkarian State University and Nalchik Volleyball Sports School. The two groups of athletes studied, KG and EG, were represented by young volleyball players aged 13-14 (15 people each). KG athletes in the process of physical training used only jumping exercises with and without weights, as well as exercises on technique and imitation of techniques. The experimental program included specific exercises (imitation and execution of offensive strikes and blocking with weighting devices) and non-specific exercises with and without weights, as well as jumping up from a standing position and squatting in the MUV mode of resistance and facilitated movement according to an individual program.
The results of the study and their discussion. A comparative analysis of the dynamics of the test results of the participants in the experiment showed an increase in the level of development of jumping ability among young KG volleyball players for twelve months was: 8.1% when performing an upward jump from a place; 9.7% when jumping up from a run; 7.4% long jump from a place; 7.8% when jumping up from a stop; 7.8% in height the jump rate after jumping into the depth is 11.3%; the difference in the performance of jumps to the maximum height is 12.1%. The increase in the level of development of jumping ability among EG volleyball players at the end of the experiment was: when performing an upward jump from a place – 19.4%; a running jump – 23.1%; a long jump from a place – 14.5%; jumping up from a stop squatting – 15.3%; in the height of the jump after jumping into the depth – 21.5%. the difference in the performance of jumps to the maximum height is 27.7%.
Conclusions. The analysis of the jumping performance indicators of the experiment participants revealed a significant advantage in the increase of the results of the experimental group of volleyball players. Based on the test data, it can be concluded that the proposed method, using the MUV, provides a higher increase in jumping performance due to the precise distribution and increase in the range of load changes, taking into account the capabilities of the young athlete (creating variable resistance modes), ensuring maximum synchronous manifestation of strength, speed, and endurance, as well as regulating both external force and internal resistance created by the athlete's muscles during the exercise.

Reference

1. Belyaev, A. V., & Bulykina, L. V. (2004). Pryzhkovaya podgotovka voleybolistov v podgotovitel'nom periode na osnove analiza ikh sorevnovatel'noy deyatel'nosti [Jump training of volleyball players in the preparatory period based on analysis of their competitive activity]. Teoriya i praktika fizicheskoy kultury, 3, 37.