Abstract. The problem of improving the substitute players preparation system in the game of football was and remains quite current at the contemporary stage. One of the acute problems in this regard is the selection of young footballers on certain criteria. According to the analysis of the literature, it was highlighted that most specialists focus on the traditional selection criteria of young footballers and very few of them take into account the structure and content of the activity on each game. It was this criterion that was the basis of the research undertaken, where all the game actions performed by footballers on the main game positions were analyzed, in order to be able to select both the right people for these positions and their specific training, of each game position. This will ultimately lead to an increase in the quality of training of footballers, both on the playing field and for the team as a whole.