Is the GI System Built For Exercise?
The gut usually meets the fluid, electrolyte, and nutrient requirements of mild to heavy exercise. Gastric emptying and intestinal absorption rates of beverages ingested during exercise equal sweat rates. However, strenuous or prolonged exercise under dehydrated conditions can produce gastrointestinal distress and tissue damage.
Gisolfi
Carl V.
CV
Department of Exercise Science at the University of Iowa, Iowa City, IA 52242-1111.