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It's no wonder Pippa Middleton caused such a stir at the royal wedding in April 2011: Her praise-worthy backside, which was well-showcased in a form-fitting bridesmaid dress, showed off her firm athletic side too. Two months after the nuptials, Middleton participated in the Blenheim Palace Triathlon in Oxfordshire as part of a relay team. Two years earlier, she had done the full triathlon herself, which also includes a 750-meter swim and a 20-kilometer bike ride, in 1:26:01. She's not limited to warm-weather sports, though: In March 2012, the Duchess of Cambridge's sporty sister completed a 56-mile cross-country ski race and last March she finished a 26.2-mile cross-country ski marathon.
Check out who’s conquered a marathon or triathlon, and be inspired to cross the finish line yourself