The 5-Minute Ultimate Core Workout

You rely on your core (a.k.a. back muscles and abs) for virtually every move you make. Here's how to show it some love.

Credit: Jay Sullivan

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Super-fast results

Who can resist a toning two-for-one deal? That's why we love this strengthening and shaping workout from instructor Maryanne Blake at the Sports Club/LA—Boston, based on her hot ZenCore class. Each move challenges your core—those crucial ab and back muscles you call on every time you turn, bend, lift, you name it—while sculpting other muscle groups, too.

To shore up your core, plus tighten you up all over, pick an upper-body, lower-body and mid-section move and perform the trio twice, 3 to 4 times a week.

Next: Upper body: Push-up alternating knee tap

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