Why Does A Guy Like Lance Armstrong Have Gastrointestinal Issues During A Triathlon?

Last week, at Ironman 70.3 Galveston, Lance Armstrong decimated the field on the bike, but then slipped to a disappointing seventh place finish due to hydration and nutrition problems during the run. So why does a guy like Lance Armstrong have gastrointestinal issues during a triathlon? And what should you be eating during a triathlon? [...]

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