7 Weighted Ab Exercises — For When You Really Want to Torch Your Core

A regular plank engages your core muscles; add in a weighted rotation, and you get the extra benefits from the twisting motion. The picture shows an unweighted version; to add a weight, hold a dumbbell in each hand.

• Begin in a plank position holding a light dumbbell in each hand, keeping your wrists straight. Open your feet a little wider than hip distance.
• Lift your left hand to the ceiling, twisting through your entire torso. Your pelvis will rotate, but keep it level.
• Return your left hand to the floor, and repeat this action on the other side. That's one rep.