Another ballet-inspired move, this leg toner forces your inner-thigh muscles to engage to control the motion of your leg (without falling over).
How to do it: Stand on your right leg, right knee slightly bent, hands on hips. Lift your left leg into an 'attitude' position by bending your left knee and lifting your leg up and across your body, turning your left heel up as you lift. Next, open your left leg out to the side of your body, straightening your leg out into a full extension as shown. Repeat 15 times with your left leg and then 15 times with the right leg.
Form tip: Maintain good posture (like a ballerina) during the entire movement by keeping your spine tall, abs tight, and chest lifted.