The physician-cosmonaut tasks in stabilizing the crew members health and increasing an effectiveness of their preparation for returning to Earth.
During a final 4-month stage of 1-year space flight of cosmonauts Titov and Manarov, a physician, Valery Polyakov was included on a crew for the purpose of evaluating their health, correcting physical status to prepare for the spacecraft reentry and landing operations.  The complex program of scientific investigations and experiments performed by a physician included an evaluation of adaptation reactions of the human body at different stages of space mission using clinicophysiological and biochemical methods; testing of alternative regimes of exercises and new countermeasures to prevent an unfavorable effect of long-term weightlessness.
Polyakov
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Institute of Biomedical Problems, Ministry of Health of the USSR, Moscow.
D000337:Aerospace Medicine; D018480:Astronauts; D005081:Exercise Therapy; D006304:Health Status; D006801:Humans; D008297:Male; D008991:Monitoring, Physiologic; D010819:Physician's Role; D013026:Space Flight; D014893:Weightlessness; D018544:Weightlessness Countermeasures