TY JOUR TI Assessment of the psycho-emotional state of elderly people engaged in physical education and health-improvement programs under the Moscow Longevity Project KW elderly people KW program KW project "Moscow longevity" KW SAS questionnaire KW general physical training KW Nordic walking KW gymnast JO Journal of Pedagogical Studies AU Krivenkov, A.A. AU Kim, T.K. PY 2020 IS 5 PB INFRA-M Academic Publishing LLC.