1. Raise your heels, stand with both legs upright, and bend one knee backward until it touches the buttocks. Alternate the legs and raise each side 20 times. 2. Lie on your back with your head in your hands, lift one leg and bend the knee. Straighten; alternate legs, 20 times each time. 3. Stand against the wall, raise your legs and bend your knees, touch your toes to the ground, and perform circular movements. Do 10 times on each side.