%0 Journal Article %T Organization of sports training for qualified long jumpers using blood enzyme activity %A Grivtsov, L.K. %A Sukhareva, S.M. %K athletics, long jump, sports biochemistry, creatine kinase, individualization of the training process, blood biomarkers %J Scientific notes of P. F. Lesgaft University %D 2025 %N 0 %P 5 %I National State University of Physical Education, Sports and Health named after P.F. Lesgaft