Fluid regulating factors: Responses to oral and intravenous saline rehydration and subsequent exercise in the heat

he purpose of investigation was to examine the responses of plasma arginine vasopressin (AVP), renin activity (PRA), and aldosterone (ALD) to oral or intravenous (IV) saline rehydration, following dehydration, and before and after an exercise tolerance test (ETT), in a hot environment. We hypothesized that the responses of these factors would not differ between the rehydration treatments. On four occasions, 8 males (22.1...