Specific physiological factors, such as splanchnic hypoperfusion and increased intestinal permeability during high-intensity or prolonged physical activity, induce exercise-associated gastrointestinal symptoms including nausea.
The claim asserts that specific physiological factors induce nausea during exercise. Multiple retrieved papers (such as papers 2, 3, and 4) discuss exercise-induced gastrointestinal syndrome and specific mechanisms like splanchnic hypoperfusion, altered intestinal permeability, and motility changes during high-intensity exercise that provoke nausea and other gastrointestinal symptoms. Therefore, the claim is well supported by the literature.