TY JOUR TI CHANGES TO THE INDICATORS OF BIOIMPEDANCE ANALYSIS OF BODY COMPOSITION DEPENDING ON THE PHASES OF THE MENSTRUAL CYCLE IN QUALIFIED SWIMMERS AGED 15-17 YEARS KW training process KW transition period KW qualified swimmers KW menstrual cycle KW cycle phases KW swimming JO Scientific notes of P. F. Lesgaft University AU , .. AU , .. PY 2023 IS 0 PB National State University of Physical Education, Sports and Health named after P.F. Lesgaft