TY JOUR TI Optimization of motor activity among international students during adaptation to higher education in a Russian university KW physical education of students KW healthy lifestyle KW physical activity KW social environment KW extracurricular activities KW functional state JO Scientific notes of P. F. Lesgaft University AU Paschenko, L.G. AU Pitulin, A.V. AU Pashchenko, E.S. PY 2026 IS 0 PB National State University of Physical Education, Sports and Health named after P.F. Lesgaft