Forget planks — this 15-minute crunches workout sculpts your abs

This 15-minute crunches workout targets your upper abs - here

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Forget planks — this 15-minute crunches workout sculpts your abs

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Forget planks — this ab workout sculpts your core in 4 exercises

How To Do Crunches Properly For Strong Abs, From A Trainer

I'm a personal trainer — here are 3 best compound exercises for cutting V-shaped back muscles

Sculpt your abs and strengthen your core with 6 moves in 6 minutes

The Perfect 15-Minute Ab Workout

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