ABSTRACT
The paper presents experimental data supporting a hypothesis that the changes of arterial blood haemoglobin saturation during breathing the hypoxic gas mixture (10-13% O2) can be fitted by exponential function. The formal description of the saturation curves allowed verifying their stages and evaluating interindividual variability. It is suggested that the parameters of exponents can be used when estimating an individual hypoxic resistance of a human organism.
Subject(s)
Hypoxia/blood , Oxygen/blood , Oxyhemoglobins/metabolism , Adolescent , Adult , Aged , Child , Child, Preschool , Female , Humans , Hypoxia/chemically induced , Male , Middle Aged , Nitrogen/pharmacology , Oxygen/pharmacology , Oxyhemoglobins/analysis , Radiation-Protective Agents/pharmacology , Time FactorsSubject(s)
Autonomic Nervous System/physiology , Heart Rate/physiology , Temperament/physiology , Child, Preschool , Female , Humans , Infant , MaleABSTRACT
The results obtained characterize changes in energy exchange and cardiovascular function that develop in exercising men in high mountains. At an early period of adaptation muscle performance decreased, indicating a new level of homeostatic regulation. The effectiveness of individual systems may differ from that of the whole body. Some of them (e. g., the cardiovascular system) may function very effectively, taking upon themselves additional functions. The final effect of adaptation to high mountains is an increase in the effectiveness of the whole body and an increase of aerobic reserves at sea level. Metabolic changes involve those that enhance lipid metabolism, including these that maintain active glycolysis. Structural rearrangements seem to be provided by a higher somatotropic activity of the hypothalamic-pituitary system.
