Faculty of Physical Culture, Department of Sports Activity

Introduction
Developing physical training and sport and bringing up perfect and unimpeachable younger generation is one of the state policies of our country. The laws of the Republic of Uzbekistan take important notice of improving effectiveness of physical training lessons in educational institutions. As a result of this attention great reforms are being done in the sphere of physical training and sport. Modern sport gyms have been built in every city, town and village of our country and the youth are training with their favorite kinds of sport. Sport is becoming necessity of their everyday life [1], [2].
In modern volleyball game effective performance and high results depend not only on physical readiness but also on highly developed technical and tactical skills[3].
Aim of the work
Aim of the work is learning and analyzing the methods of the effectiveness of receiving a ball in the volleyball game. The main aim of tactical movements of defense is to stop the attacks of the opponent and resist them.
Tactical movements of defense include team movement, group movement, and individual movement. Team movements can be seen in three situations: receiving the ball sent from the service area, receiving the opponent team’s attack or the ball returning from the net not passing into the opposite court [4], [5].
In modern volleyball game the team organizes its tactical defense as corner forward(picture- 1a) and corner backward system (picture-1b) .



a b
picture – 1

According to the above mentioned factors and situations it is important to apply one of the acceptable tactics of defence in the game.

While receiving the ball the position of the players in the court is in two versions: linear version and stage version. Linear version (picture - 2) is applied when the players are qualified enough to receive the ball and when planning not difficult tactics during the attack[6],[7].

a b
picture – 2

In this version players are placed evenly around the court. Stage version is practically observed in modern volleyball games. This version enables qualified players to receive the ball and organize successful attacks. If the player in the third stance is not skillful enough to receive the ball or if the player in the fourth stance is not skillful enough to attack well, this version is very acceptable [8],[9]. If the player in the third stance is skillful enough to receive the ball, he/she moves to the backward of the court.

Team position of the linking player moving from the fifth stance is also given. This position is a little bit difficult but is applied more frequently. In this position it is desirable that team apply 5+1 system.
There are three versions of organizing defense while receiving opponent team’s attacks: along the line- in which one of the players in front defends the player blocking the opponent’s attack. Front stage – in which the player in the sixth stance defends the players blocking. Back stage- in which the players in the first or fifth stance defend the blocking players. These are chosen according to the feature of blocks or attacks [10],[11].
According to the second table we can see that the total number of balls served during the game is -10, exactly received balls are- 7, lost balls are – 3, efficiency is – 70%.
The total number of balls served using oscillatory movement during one game is – 28, exactly received balls are – 15, lost balls are – 13, efficiency is – 53.5%.