TY JOUR TI Methodology of physical activity rationing in recreational physical activity through digital technologies KW recreational physical training KW physical activity rationing KW pulse KW heart rate KW wearable devices JO Scientific notes of P. F. Lesgaft University AU Kovalev, A.A. PY 2025 IS 0 PB National State University of Physical Education, Sports and Health named after P.F. Lesgaft