Abstract
On 5 successive days, 6 subjects underwent a 10-mile, 2-hr, forced march to investigate the effects of exercise on parotid fluid flow rate, and levels of free 17-hydroxycorticosteroids, Na, K, and Cl in this secretion. Means for the 5 days for all 6 subjects showed no significant differences in these variables that could be related to exercise. There was, thus, no suggestion of altered adrenocortical function or change in electrolytes that might be expected to accompany such an alteration.