TY JOUR TI MOTIVATIONAL MECHANISMS FOR STUDENT PARTICIPATION IN SPORTS CLUB ACTIVITIES KW university KW student sports club KW positive and negative motivation KW triggering factors KW self-actualization KW people with disabilities JO Management of the Personnel and Intellectual Resources in Russia AU Zhelinskaya, M.A. AU Zaharov, N.L. PY 2026 IS 15 PB INFRA-M Academic Publishing LLC.