Effect of physical exercise on gastric basal secretion in healthy men.

Behaviour of basal gastric secretion of electrolytes, lactic acid and pyruvic acid was studied in twenty-minute portions in 14 healthy men in rest, during exercise and restitution. On bicycle ergometer in sitting position all studied men performed the average work 15 120 +/- 1800 kpm during 20 minutes. It was found that basic gastric secretion didn't change significantly during exercise, but its significant decrease occurred during twenty-minute restitution after exercise. During restitution secretion of Cl, Mg and Ca also significantly decreased while their concentrations didn't change in gastric juice. During physical exercise it was found the increase of lactic acid secretion in gastric juice; it was statistically significantly higher during restitution than in rest period (p less than 0.001) and during exercise (p less than 0.02).