This article provides information on the experimental effectiveness of the training process to 12-13 year-old handball players in their formed team-game specialization. Currently, the competition calendar has radically changed, it has become more dense and intense for teams of different levels and ages with high demands on the results of the competition. And this, in turn, creates difficulties in the training process of athletes, allowing an excessive intensification of training sessions, with all the ensuing consequences. We believe that in this situation, in order to improve the sports training of handball players, at the present stage, it is necessary to use other possible reserves, which suggest, against the background of general training processes, the restructuring of the existing ways of organizing game capabilities, including an earlier age-related team-game specialization of athletes, in which their role, as an individual sports and technical characteristic, will be especially effective in competitive manifestations.