15 Double-Duty Moves That Work Your Abs and Booty at the Same Time

Your abs will work to stabilize your torso as you lift your legs, which will work and your butt.

• In an elbow plank, lift your left foot off the floor, keeping your pelvis parallel to the floor. Hold for three seconds, then lower the leg. This completes one rep. Repeat on the other side.
• Start with 16 alternating leg lifts.