TY JOUR TI NIZHNEVARTOVSK FEMALE STUDENTS’ CARDIAC ACTIVITY INDICATORS DEPENDING ON PHYSICAL ACTIVITY LEVEL KW students KW northern regions KW cardiac output KW stroke volume KW heart rate KW blood pressure JO Bulletin of Nizhnevartovsk State University AU Shalamova, E.. AU Pogonysheva, I.. AU Ragozin, O.. AU Pogonyshev, D.. AU Kuchumov, M.. PY 2026 IS 0 PB Nizhnevartovsk State University