1. Lashkevich S. V., Vrublevskiy E. P., Chitaikina N. B. [et al.] (2021), “Footballers' competitive activity criteria”, Theory and practice of physical culture, No 5, pp. 88–90.

2. Salomakhin E. A., Vovk S. I. (2024), “Comparative analysis of competitive motor activity of football players of different ages at the 2022 World Cup”, Sports and pedagogical education, No 4, pp. 58–66.

3. Kalinin E. M., Kuzmichev V. A., Khomyakova A. A. [et al.] (2022) “Characteristics of competitive activity of football players of various playing roles in youth national teams”, Theory and practice of physical culture, No 12, pp. 28–30.

4. Leksakov A. V. (2025), “Problems of competitive activity of football players aged 14-15”, Physical education: education, training, No 4, pp. 75.

5. Tamozhnikov D. V., Tamozhnikova I. S., Sigeev V. R. (2024), “Influence of biological age on indicators of competitive activity of 12-14 aged young football players”, Physical education and sports training, No 1 (47), pp. 75–81.

6. Vlasov A. E., Kocheshkov N. A., Chigirintseva O. V. (2023), “Stages of competitive activity formation of 7-10 years old football players”, Sports Science Bulletin, No 3, pp. 26–32.

7. Korzun D. L., Valeev I. A. (2025), “The content of group and team technical-tactical training of 17-18-year-old football defenders taking into account the diversity of their defensive functions”, Scientific Notes of the P.F. Lesgaft University, No 10 (248), pp. 38–44, DOIhttps://doi.org/10.5930/1994-4683-2025-10-38-44.

8. Orlov A. V. (2023), “Target model of team technical and tactical actions in football”, Scientific Notes of the P.F. Lesgaft University, No 11 (225), pp. 280–283.

9. Shestakov M. M. (2024), “Possibilities of predicting individual indicators of competitive activity of football players at different stages of sports training”, Physical education, sport – science and practice, No 2, pp. 97–102, DOIhttps://doi.org/10.53742/1999-6799/2_2024_97-102.

10. Shestakov M. M. (2023), “Indicators of the pre-game state of qualified football players, affecting on the effectiveness of competitive activities”, Physical education, sport – science and practice, No 1, pp. 106–112, DOIhttps://doi.org/10.53742/1999-6799/1_2023_106-112.