TY JOUR TI COMPARATIVE ANALYSIS OF PHYSICAL FITNESS INDICATORS OF 8-9 YEARS- OLD TENNIS PLAYERS WITH NORMATIVE VALUES OF THE FEDERAL STANDARD OF SPORTS TRAINING FOR THE SPORT TENNIS KW tennis players 8-9 years old KW indicators of physical fitness KW federal standard of sports training in the sport "tennis" 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