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Arch Environ Contam Toxicol. 1991 Sep;21(3):462-7.

The effect of exercise associated with subchronic poisoning with potassium nitrate and sodium nitrite on the processes of intestinal absorption of D-xylose in rats.

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Department of Food Studies and Nutrition Physiology, Military Institute of Hygiene and Epidemiology, Warsaw, Poland.


The intestinal absorption of D-xylose was studied during the subchronic poisoning of male Wistar rats with orally administered potassium nitrate and sodium nitrite associated with exercise; running on a moving track during the last two weeks of poisoning. The metabolic parameters of Na+/K(+)-ATPase, alkaline phosphatase, oxygen uptake, and lactic acid level in the small intestine mucosa were determined one hour after D-xylose treatment. Exercise increased the toxicity of potassium nitrate and sodium nitrite. The experiment demonstrated post-exercise reduction of D-xylose absorption and decrease activity of Na+/K(+)-ATPase and alkaline phosphatase. Exercise caused transient hypoxia of the small intestine, which was observed only in the groups subjected to exercise on the day of the determinations.

[Indexed for MEDLINE]

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