TY JOUR TI ARCHITECTURAL AND PLANNING PRINCIPLES OF FITNESS CENTERS ORGANIZATION KW fitness centers KW architectural and planning organization KW principles of design KW functional zones KW energy efficiency JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Zhdanova, I.V. AU Kuznetsova, A.A. AU Mikhailina, P.I. PY 2019 IS 4 PB Belgorod State Technological University named after V.G. Shukhov