Changes in autonomic response and resistance to acute graded hypoxia during intermittent hypoxic training

A placebo-controlled study was performed to examine the effects of intermittent normobaric hypoxic preconditioning on the autonomic regulation of blood flow, as well as on heart rate variability (HRV) response and resistance to acute hypoxia, in healthy male volunteers. Intermittent hypoxic training...

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Bibliographic Details
Published in:Human physiology 2007-04, Vol.33 (2), p.199-206
Main Authors: Bobyleva, O. V., Glazachev, O. S.
Format: Article
Language:English
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Summary:A placebo-controlled study was performed to examine the effects of intermittent normobaric hypoxic preconditioning on the autonomic regulation of blood flow, as well as on heart rate variability (HRV) response and resistance to acute hypoxia, in healthy male volunteers. Intermittent hypoxic training (IHT) increased the efficiency of the mechanisms of autonomic regulation of heart rate (HR) at rest by increasing the parasympathetic control and optimized changes in HRV during simulated acute hypoxia. The hypoxic preconditioning contributed to increased resistance of the body to simulated acute hypoxia, as reflected by less marked hemoglobin desaturation and a smaller increase in the HR. The training effects of the IHT were more pronounced in the subjects with an initially low resistance to a hypoxic factor as compared to those resistant to acute hypoxia.
ISSN:0362-1197
1608-3164
DOI:10.1134/S0362119707020107