There are places in the world where long distance running is actually a hunting technique. At least 3 guys set out after their quarry, running after it, making it keep having to run ahead of them, in the middle of the day. After a couple hours of this one of the men begins to sprint, when they see that the prey has slowed down. It works because the animal has no method of cooling itself, and when it overheats it just stops, then the men catch it.