START: Slide a band around both feet and pull it up so it is positioned above the knees. Lie on the floor on your right side, with your your hip and knees bent about 90 degrees. Your left leg should be on top of your right leg and your feet should be be on top of each other with your heels touching.
Exercise: Keeping your feet together, raise your left knee as high as you can (going into external rotation), without moving your pelvis and keeping your bottom leg still. When you lift your top knee you will get resistance from the band. Pause at the top for a second, then lower your knee back down to the starting position.