The main aim of this study was to find out the increase level of the differentiated special physical training for different age categories of footballers depending on their positions in the field, especially defenders. A complex test of special physical features has been performed in order to achieve this objective. Revaluation of the training process of children and juniors practicing football is a complex phenomenon that requires training solutions based on multiple information, experiments, research and studies. It has a number of features, mainly due to the peculiarities that are shown by different periods of their development. That’s why the problem of differentiated physical training for 13-14 year-old footballers has been approached. The settled current major scientific issue in this area covers a differentiated approach to the development of the young footballers’ specific physical qualities which will further optimize the educational process and enhance its effectiveness. Following the review of literature in the field, teachers’ observations during the experiment, and relying on survey data, the following have been prioritized: the development of physical qualities specific to young players depending on their game positions, the ways of their manifestations, determining the specific differentiated physical training level in the course of one-year training cycle, which, in their turn, extend and complement the existing layout in the theory and methodology of sports training in football.