The paper is concerned with the data on change in the blood level of ACTH, STH, TSH, cortisol, T3, insulin, C-peptide during a 25-minute session of respiration using a gaseous hypoxic mixture with 10% oxygen (GHM-10). The investigation was performed in 23 healthy volunteers. Change in the hormonal status, characteristic of a moderate stress-reaction, was observed in 60% of the examinees. It was found out that during a GHM-10 session a degree of change in function of the studied factors of the endocrine system showed correlation with change in the activity of the autonomic nervous system.
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