Ironman champ: 'Your mind matters more'

Chrissie Wellington of England competes during the Challenge Roth Triathlon on July 10, 2011 in Roth, Germany. (P
Chrissie Wellington of England competes during the Challenge Roth Triathlon on July 10, 2011 in Roth, Germany. (P

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    Ironman champ: 'Your mind matters more'

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Four-time World Ironman champ Chrissie Wellington says being mentally fit is the key to winning.