TY JOUR TI INFLUENCE OF PHYSICAL ACTIVITY ON SAFETY OF THE FIREFIGHTER IN SIZOD AT EMERGENCY SITUATIONS KW physical activity KW breathing apparatus compressed air KW breathing apparatus with compressed oxygen JO Problems of risk management in the technosphere AU Polyn’ko, S.V. AU Ivanov, A.B. PY 2017 IS 2017 PB Saint-Petersburg University of State Fire Service of Emercom of Russia