[Evaluation of intestinal absorption of d-xylose during a controlled exercise test under different thermic conditions].

The study was aimed at investigating the effect of graded exercise performed on a cycle ergometer under different thermal conditions on the intestinal absorption. Intestinal absorption was estimated by d-xylose test in 18 men aged 19--66 prior to--and--following an exercise at neutral and raised temperature (32--33 degrees C). The work--and--thermal load applied corresponded to or even exceeded that experienced by hot working environment workers in not industry. The study failed to demonstrate any significant effect of physical effort and ambient temperature on intestinal d-xylose absorption. The formerly found decrease in intestinal d-xylose absorption during work in industry might be accounted for by combined effects of various factors inherent in occupational work.