Preparation of young volleyball players at the stage of sports improvement on the basis of development of psychophysiological functions Journal title: Здоровье, спорт, реабилитация Authors: Ye.Ya. Strelnikova, Zh.L. Kozina, I.M. Sobko, A. Nuzhna, S.B. Polishchuk, O.O. Repko, S.V. Kozin Subject(s):