TY JOUR TI PHYSICAL EXERCISES WITH THE ROLLER FOR THE PRESS AS AN EFFECTIVE MEANS OF DEVELOPING THE ABDOMINAL MUSCLES KW abdominal muscles KW strength endurance KW physical exercises KW press roller KW physical fitness JO Scientific notes of P. F. Lesgaft University AU Ziambetov, V.Y. PY 2023 IS 0 PB National State University of Physical Education, Sports and Health named after P.F. Lesgaft