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Stars' Sporty Styles!
From the Kardashian sisters to Audrina Patridge, see how celebs are staying athletic-chic for their workouts
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HAYDEN PANETTIERE
The onscreen superhero shows off her fighting shape in her hot pink shorts and simple black Under Armour tank while hiking L.A.'s Runyon Canyon. And she's sure to burn plenty of calories: Adding an incline to your walk or jog immediately pumps up the aerobic benefits and the calorie-burning potential.
