00744naa#a2200193#i#450# EN\\bibl\110860 20260412071735.7 1994-4683 20260225b2026####ek#y0engy0150####ca RU Dynamics of physical and technical preparedness during the annual training cycle in 7–8-year-old beach volleyball athletes Journal article Moscow National State University of Physical Education, Sports and Health named after P.F. Lesgaft 2026 7 с. Journal article local Волейбол. 796.325 Kostyukov Vladimir Vasil'evich Kostyukova Olga Nikolaevna Mosol Tat'yana Aleksandrovna uchzapiski.lesgaft.spb.ru