[Various aspects of amino acid metabolism in humans exposed to 120-day anti-orthostatic hypokinesia].

The free amino acid pool of blood of man exposed to 120-day head-down tilt (at -4 degrees) was examined. Beginning with bed rest day 28 and till the end of the study, the amino acid pool increased. The increase involved most free amino acids which was produced by a decline of anabolic and stimulation of catabolic processes during hypokinesia.