Dr. Hab., Associate Professor N.V. Lutkova¹
Dr. Hab., Professor Yu.M. Makarov¹
PhD, Associate Professor G.V. Zarodnyuk²
N.D. Alekseeva^3
1Lesgaft National State University of Physical Education, Sport and Health, St. Petersburg 
²Saint-Petersburg Mining University of Empress Catherine II, St. Petersburg
³Baltic State Technical University "VOENMEH" named after D.F. Ustinov, St. Petersburg

Objective of the study was to improve the efficiency of performing an attacking blow in qualified volleyball players, taking into account body balance indicators.
Methods and structure of the study. The analysis of game activity was carried out within the framework of the St. Petersburg Championship among men's teams of the 2022-2023 season. To track the progress of competitive activity, an adapted professional program Data Volley was used. To determine only one technical and tactical action, a video camera was located behind the end line of the court, and the determination of the effectiveness of an attacking strike was carried out in accordance with the classification from the manual of this program. 32 games of two teams were analyzed. Readiness to perform an attacking strike was determined during testing of volleyball players. The study of body balance indicators was carried out using the ST-150 stabiloplatform. The experiment included exercises aimed at strengthening the muscles that maintain body balance. The object of the study was 24 volleyball players (players of the SShOR «Ekran» and «PetersburgGaz» teams).
Results and conclusions. 1. It was established that the initial indicators of body balance and equilibrium management in volleyball teams are homogeneous. 2. The expediency of isolating exercises to strengthen the muscles that maintain body balance in three target blocks (to strengthen the muscular-ligamentous apparatus of the ankle joint; to strengthen the muscles of the back and spine; to develop jumping ability and body balance management) was determined. 3. It was revealed that the growth of jumping indicators is accompanied by the dynamics of indicators characterizing body balance and balance management in volleyball players. 4. It was determined that the effectiveness of performing an attacking blow during competitive activities significantly increased in the players of the experimental group.

Keywords: body balance, means, efficiency, skilled volleyball players.

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