Preliminary results of studies of the cardiovascular system in members of the 2d expedition in the Mir orbital station

: Three crewmembers of the second expedition onboard Mir were examined. Their physiological data (bioelectric activity of the heart, phasic structure of the cardiac cycle, circulation parameters at rest and circulation responses to exercise ergometry tests and LBNP tests) were monitored and transmitted to the Earth. This paper presents the physiological data obtained, their interpretation and conclusion that the Commander during his longest-term flight remained in best shape. Individual responses of each cosmonaut in terms of adaptation to flight conditions are discussed.