摘要：Collective tactics is based on division of the roles in all phases of the game. Positions, either role in the water polo, are instrumentality in realization of collective tactics. Roles in water polo are: center forward, guard, wing, external attacker and goal keeper. The aim in this study was to describe the role of the Guard (G) and to compare it with other roles. The subject of this investigation is description of all activities in the game without contact with the ball (all swimming, duels, play with player more or less). Data collection was performed by registration of player’s activity during official games of the International Adriatic Water Polo League in the season 2009/10. Main units of measuring, entities, were position-player-quarter. The results were reiterated by 21 indicators and main statistics was compiled. Differential analysis for position G with respect to other players (positions) was performed on the basis of testing the model of binary logistic regression equitation. This proportion is evaluated on the basis of frequencies of backstroke swimming at maximum intensities (0.2:0-1) and frequencies swam by crawl technique at maximum intensity (2.9:2.3) as well as frequencies of breaststroke swimming at light intensity (1.45:1.0). In total distance swam G is statistically equal with other players. Statistically significant hi is different from other players in meters swam at maximum intensity (32.1:21.6) where there is a statistically significantly contribution of meters swam in crawl technique at maximum intensity (31.4:21.3). In the play with unequal number of players (player more/less) there are no significant differences regarding the players in other roles in the game. There is a statistically significant and remarkable difference of G from other players both in frequencies (3.1:2.6) and in the time (21.8:14.1) spent in duels. By application of binary logistic regression we defined differential characteristics of G regarding other roles in the game and that typified in equitation of play structure on the position G. Solitary contributions in prediction of role G are represented in linear equitation for position G. Results of this investigation will contribute in elaboration of water polo game model in the domain of situational play without ball (realization of the collective tactics regardless the choice of the type of tactics in either attack or defense). The result brings statistical descriptions of the role G as well as, in an unusual analysis, it brings comparative properties of the role G in relation to others.
