First study of effects of Ultraman competitions

For the first time, researchers are looking at the incredibly grueling competition called the Ultraman, and what it does to your body. The Ultraman is a three-day competition designed to test an athlete's physical and mental endurance. The first day is a 6.2-mile open swim, followed by a 90-mile bike ride. The second day is a 172-mile bike ride. And the third day is a double marathon -- a 52.4-mile run.