• Fitness
Aug 9, 2012 5:20 PM EDT
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Skip The Gym — These Non-Cheesy Workout DVDs Are Actually Amazing
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Best Core: Jillian Michaels: 6 Week Six-Pack

If your core is your trouble spot (and if it's not, we hate you!), Jillian Michaels’ intense six-week workout should be your go-to DVD. It features two 30-minute workouts — the first is challenging but doable, and the second, which features core-focused cardio circuits (that means you don’t stop in between exercises. Ugh) is definitely not for beginners. Trust.

Jillian Michaels: 6 Week Six-Pack, $7, available at Amazon