Tony Kanaan: Triathlons
The 2013 Indy 500 winner is a workout fanatic who completed the 2011 Ironman World Championship. Prior to his Kona debut, Kanaan told ESPN.com that he works out twice a day, with cardio in the morning and weights in the afternoon. He has since finished a 2013 half Ironman in Miami in 5:23:43. "I don't think that triathlons are what keep me going," Kanaan says. "I am 100 percent sure that's what is doing it."