The effects of various modes of interval hypoxic training differing by the intensity and duration of hypoxic exposure on the morphology and antioxidant status of the heart and lung tissues were studied. Interval hypoxic training mode with more severe, but shorter hypoxic component led to the prooxidant/antioxidant imbalance in the myocardial and lung tissues, which was paralleled by significant disorders in their morphology and function. Moderate hypoxic exposure of different duration promoted the maintenance of optimum antioxidant homeostasis and development of compensatory adaptive changes in tissue structure.
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