Tactical efficacy and offensive game processes adopted by Italian and Brazilian youth soccer players

Abstract Aim: To analyze success and failure of offensive sequences and the adopted offensive method in under-15 (U-15) and under-17 (U-17) soccer players. Methods: The sample was composed of 218 offensive sequences performed by U-15 and U-17 players selected from 28 matches, being 18 matches of an Italian team and 10 matches of a Brazilian team. All offensive sequences which ended in finalization were selected for the analysis. Using observational methodology, an adapted ad hoc observational instrument was built with the variables “number of players involved”, “ball touches”, “passing”, “duration”, and “corridor changes”. Next, offensive actions were classified into three offensive game methods: counter-attack, quick attack, and positional attack. Results: Results revealed that teams which use positional attack expend more time constructing an offensive play, involve extra players, and change the ball corridor more often during offensive actions when compared to counter-attack and quick attack (p摘要：本研究旨在分析15岁以下（U-15）及17岁以下（U-17）足球运动员的进攻序列成败及其所采用的进攻打法。 研究方法：本研究的样本取自28场赛事中的218次进攻序列，参与球员均为U-15及U-17年龄段运动员，其中包含意大利球队赛事18场、巴西球队赛事10场。本研究仅选取以进攻终结收尾的进攻序列开展分析。本研究采用观察研究法，构建了经适配的特设观测工具，所纳入的观测变量包括：参与球员人数（number of players involved）、触球次数（ball touches）、传球情况（passing）、进攻时长（duration）以及进攻路线变更次数（corridor changes）。随后，本研究将进攻行为划分为三类进攻打法：防守反击（counter-attack）、快速进攻（quick attack）与阵地进攻（positional attack）。 研究结果：结果表明，相较于采用防守反击与快速进攻的球队，采用阵地进攻的球队在进攻过程中，构建进攻配合的耗时更长、参与进攻的球员人数更多，且进攻路线变更频次更高（p