TY CONF TI THE EFFECT OF RESPIRATORY MUSCLE TRAINING ON THE PARAMETERS OF EXTERNAL RESPIRATION AND PHYSICAL PERFORMANCE OF FOOTBALL PLAYERS AGED 17-20 YEARS KW breathing simulator KW football players KW spirometry KW heart rate JO VII All-Russian scientific and practical conference with international participation "Sports Informatics Day" AU Anikeev, V.I. AU Laptev, A.I. PY 2024 PB Russian Association of Computer Science in Sports