Ab Workout: Hard-Core Results

Part One of this six-part series is designed to strengthen your deep abdominal and core muscles. That’s the secret to making your superficial six-pack muscles pop like never before. And you’ll be stunned at how little you need to do to see amazing results.

How to do it: Complete one or two circuits—performing one exercise after the next without rest—two or three days a week. Rest one minute between each circuit and at least a day between each session. Do 10 repetitions of each exercise.

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