Analysis Of Intense Actions Are Dependent Of Tactical Function In Soccer Players

Abstract

PURPOSE: A determining factor during a soccer game is the intense action, which can be perceived by the number of sprints, accelerations, decelerations. One possible hypothesis is that there are differences between the tactical functions during the soccer match. Thus, this study examined the differences between the indicators of the intense actions by tactical functions. METHODS: Activities of 20 full official matches were collected and analyzed using GPS Polar Team Pro System. In thus study were used five positional roles in soccer players (side-backs, full-backs, defensive midfielders, offensive midfielders, attackers) within the tactical scheme 4-4-2. The indicators of the intense actions were number of sprints, % of intense actions (speed of 14 to 25.1 km.h-1), amount of accelerations and decelerations, maximum speed in addition to the total distance of displacements. A repeated measures analysis of variance (Kruskal-Wallis) was performed for distances covered at different intensities between positions. RESULTS: Significant differences were found for the full-backs with side-backs, defensive, midfielders, offensive midfielders, attackers (H=53.52; p<0.01), referring to total distance traveled during a game. It was shown that the indicators of the intense actions between the side-backs and full-backs with defensive and offensive midfielders, and attackers, was relative to the % intense actions (H=75.17; p<0.01), sprints (H=58.07; p<0.01), amount of decelerations (H=77.54; p<0.01) and accelerations (H=55.61; p<0.01). However, for the execution of the maximum speed were observed in side with full-backs and midfielders (p <0.01). Significant differences were found between intense actions between side-backs and full-backs with defensive and offensive midfielders and attackers, allowing to emphasize that the midfielders and attackers need to be more intense than side-backs and full-backs, mainly in the tactical scheme 4x4x2. The main finding was that offensive, defensive midfielders and attackers had higher activity at all intensities, including intense sprinting, high-intensity actions, and in accelerations and decelerations. CONCLUSIONS: These results show that intense actions are highly dependent on positional role and relative tactical organization in a soccer team.