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The 10-Minute Workout That Will Fry Your Abs

The 10-Minute Workout That Will Fry Your Abs

Men's Health - By BJ Gaddour, MH Fitness Director

This plank jack complex will crush calories and carve your core The plank strengthens the dozens of muscles between your shoulders and hips. But if you jack your feet in and out as you do it, the plank suddenly becomes so much more than just a core builder. The quick movement of your feet provides a …

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