Sultanov Usman Ibragimovich. AT THE STAGE OF IN-DEPTH SPECIALIZATION PROBLEMS OF MANAGING THE TRAINING PROCESS OF LONG-DISTANCE RUNNERS. IJSSIR [Internet]. 2022 Oct. 31 [cited 2026 Mar. 31];11(10):299-307. Available from: https://gejournal.net/index.php/IJSSIR/article/view/1180