Chrissie Wellington, best at exercising

Check out this profile of Chrissie Wellington, the current record holder in the Ironman. Most interesting to me is that in her youth she wasn't really athletic. She ran a marathon in her 20s, but got hit by a car and began to ride and swim for cross training. Now she's world champ. She trains in Boulder with her husband, and her training has caused her to put a career in development economics on hold.