Almost 3000 athletes from over 20 different countries are taking on Ironman Louisville 2009 triathlon today, Sunday August 30th.
The 2.4 mile swim, followed by the 112 mile bike, followed by the marathon run will test them to the extreme.
Australian Luke McKenzie, a two-time Ironman champ, and South Africa's Raynard Tissink, with five Ironman titles, are favorites to win on the men's side.
Kramer-Postma Nina Kraft, and Fernanda Keller will battle Lisbeth Kristensen as she tries to defend her title on the women's side of the race.
You can watch the Ironman Louisville 2009 race live at UniversalSports.com.