Burn Major Calories With This Celeb Treadmill Favorite

The celebrity secret to shaping up in not a lot of time? Hard-core treadmill intervals that blast fat and burn tons of calories. That’s why celebs like Kim Kardashian, Jessica Biel, and Amanda Seyfried are just a few famous faces who are obsessed with the studio workout Barry’s Bootcamp, which alternates treadmill intervals with just-as-difficult…

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