I'm a personal trainer — sculpt core muscle with 3 ab exercises and one dumbbell in just 15 minutes

Sculpt stronger abs using these moves

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15-Minute Ab Workout

Forget sit-ups — this 3-move ab workout chisels concrete core muscles in just 15 minutes

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You don't need weights to build a stronger core, just this 4-move

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I'm a personal trainer — this is my favorite dumbbell exercise for building full-body strength