What motivates a man to suffer?  
To put himself on the edge of his physical limit, and then push harder... when reason calls for rest?
 
What makes a man want to swim 2.4 miles, bike 112 miles, and then run a 26.2 mile marathon?
No moment to relax. No rest, without the certain threat of what comes next.

What kind of person does it take to face down this 140.6 mile odyssey? To believe he can make it all on his own.
What makes these people tick? What drives the relentless tempo of their legs? The furious beating of their hearts?

This is the Ironman!