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ISSN 2522-9028 (Print)
ISSN 2522-9036 (Online)
DOI: https://doi.org/10.15407/fz

Fiziologichnyi Zhurnal

is a scientific journal issued by the

Bogomoletz Institute of Physiology
National Academy of Sciences of Ukraine

Editor-in-chief: V.F. Sagach

The journal was founded in 1955 as
1955 – 1977 "Fiziolohichnyi zhurnal" (ISSN 0015 – 3311)
1978 – 1993 "Fiziologicheskii zhurnal" (ISSN 0201 – 8489)
1994 – 2016 "Fiziolohichnyi zhurnal" (ISSN 0201 – 8489)
2017 – "Fiziolohichnyi zhurnal" (ISSN 2522-9028)

Fiziol. Zh. 2004; 50(6): 32-42


Influence ofintermittent hypoxic training on adaptation to load hypoxia in rats

B.L.Gavenauskas, I.M.Mankovskaya, V.I.Nosar, A.I.Nazarenko, L.V.Bratus

    Bogomoletz Institute of Physiology National Academy ofSciences of Ukraine.


Abstract

The aim of this study was to investigate physical endurance, maximal oxygen uptake, oxygen partial pressure, and pH in blood and skeletal muscle as well as the muscle metabolic parameters (lactate and pyruvate concentration, lactate/pyruvate and NAD/NADH ratios, succinate dehydrogenase activity, ADP-stimulated mitochondrial respiration) under various regimen of combination of endurance training with intermittent hypoxic training (IHT) in adult Wistar rats. It was shown that physical endurance, maximal oxygen uptake, and muscle PO2 (PmO2) were maximally increased in those animals who simultaneously underwent endurance training and IHT. The same animals demonstrated the minimal decrease in PmO2, blood and muscle pH under testing intensive physical workload. The latter led to the lesser shifts in metabolic parameters in the muscle of rats adapted both to IHT and endurance training than in rats adapted to endurance training only. The combined effects of IHT and adaptation to load hypoxia resulted in an increase of the role of NADH . oxidation pathway in the mitochondrial energy production.

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