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Who needs the gym? Jessica Biel, Pippa Middleton and more sprint through the streets to stay in top form
Credit: Martin Karius/Startraks
Updated: Thursday Aug 18, 2011 | 06:00 AM EDT
By: Alex Apatoff
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Heidi, Pippa, Kate and more stay toned simply by playing in the snow!
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Surely you don't think that enviable behind came easy! The Duchess of Cambridge's little sis stays in shape by jogging in London – good preparation for tough challenges like the 20-mile race she recently ran in Scotland!
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