Btw, if you need inspiration have alook at the video below...

Julis Moss had just completed a 3.8km swim, 180km cycle and was leading the womens race in the closing stages of the Marathon ( 42.2Km ) when her body basically told her to stop. Obviously her mind had other ideas.

She was beaten withing only meters from the finish line. She had to finish the race crawling across the finish line.

http://boss.streamos.com/wmedia/iron...mossABCtag.wvx

I remember watching this back in 1982 when it happened and vowed to one day complete an Ironman.