By widening the blood vessels, NO helps in delivering more oxygen to the intense working muscle cells, which improves exhaustion tolerance. (fitnessandpower.com)
It does an excellent job of widening the blood vessels by relaxing muscle cells in the vessel walls to regulate blood pressure. (pronutrics.co)
Arginine functions by widening your blood vessels during the workout, providing your muscles with more oxygen and nutrients, which results in bigger muscle pumps. (fitnessandpower.com)