This move works both legs from multiple angles to help you get the most out of every rep.
How to do it: Stand with your feet together, hands on your hips. Lower into a narrow squat by bending your knees and pushing your hips back. Hold the squat position on your right leg and extend your left leg out to the side, pointing your foot. Lift your left leg off the floor and bring it in front of your body, squeezing your inner thighs until your knees are touching. Hold for 1 count and then lower your left leg back down to the side. Repeat 10 times on the left, and then repeat 10 times with the right leg.
Form tip: This one is a tough balance challenge, so hold onto a chair or a wall with your hand for support if you need to.