How Pippa Middleton stays in shape

Chris Brunskill/Getty

Pippa Middleton (C) crosses the finish line during the GE Blenheim Triathlon.

So that's how Pippa Middleton keeps her world-famous booty in shape.

The scene-stealing sister of Britain's newest royalty broke a sweat at the Blenheim Triathlon in Woodstock, England on Saturday afternoon.

(Chris Brunskill/Getty)

The buff-looking 27-year-old was snapped running between two men - including a shirtless one who accidentally ran into her down the stretch.

But Middleton was undeterred and triumphantly crossed the finish line to proudly receive a finisher's medal. Competitors in the triathlon could run a sprint of 750m sprint, 10 km bike and 2.5 km run or a super sprint, which was 450m swim, 10km bike and 2.5km run route.

(Chris Brunskill/Getty)

In the pictures of the event, Middleton's competition appears to be too engrossed in their race to notice that they were running, swimming and biking with Britain's newest celebrity.

The triathlon was just part of Middleton's fitness routine which reportedly includes everything from swimming, tennis and pilates.

Her royal sister, meanwhile, was at Derby Day in Epsom, England with her new hubby and Prince Andrew, US Weekly reported.

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Source: http://feeds.nydailynews.com/~r/nydnrss/gossip/~3/VSVanCO44tk/2011-06-04_look_pippa_middleton_spends_sunny_saturday_in_england_running_a_triathlon_.html

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