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Pippa Middleton's Sizzling Summer Workouts

That famous behind doesn't come easy. From leisurely jogs to full-on triathlons, see how the Duchess of Cambridge's kid sister stays fit


A triathlon is small potatoes for the famously athletic Brit, who also participated in this summer's grueling Highland Cross race, a 50-mile trek across Scotland that begins with a challenging 20-mile run.