TY JOUR TI PHYSIOLOGICAL FEATURES OF AN AGING BODY AND METHODOLOGICAL RECOMMENDATIONS FOR FITNESS CLASSES KW fitness KW gym workouts KW old age KW senile age JO Scientific Papers Collection of the Angarsk State Technical University AU Usov, K.I. PY 2023 IS 2023 PB Federal State Funded Educational Establishment of Higher Education «Angarsk State Technical University»