%0 Journal Article %T TYPOLOGICAL FEATURES OF THE HIGHER NERVOUS ACTIVITY OF EXTREME ATHLETES AT THE PREPARATORY STAGE %A Zhmurova, T.A. %A Ryabcev, S.M. %K athletes, extreme sports. heart rate variability, anxiety %J Scientific Notes of V.I. Vernadsky Crimean Federal University. Biology. Chemistry %D 2024 %N 10 %P 9 %I V.I. Vernadsky Crimean Federal University