On top of that, it also stimulates the VEGF molecule to basically go on and stimulate the growth of those blood vessels and that ultimately increases our endurance and allows us to basically carry out that process much more effectively and much more efficiently. Now, exercise, as it turns out, is not the only process that uses this particular type of mechanism. Another very important and very dangerous thing that uses this mechanism is cancer. So cancer or cancer cells are these abnormal cells that essentially grow very quickly and very rapidly. So they divide very quickly. And what that means is they have to have a very high supply of ATP to actually live and continue dividing and growing.