TY JOUR TI CONTENT OF CONDITIONING TRAINING FOR MATURE MEN INTERESTED IN UNDERWATER HUNTING KW conditioning training KW underwater hunting KW hypoxic training KW breathing gymnastics KW running KW weight-weighted exercise of one's own body JO Scientific notes of P. F. Lesgaft University AU Glubokaya, M.V. AU Glubokiy, V.A. AU YUsupova, O.A. PY 2023 IS 0 PB National State University of Physical Education, Sports and Health named after P.F. Lesgaft