Begin lying on your back with your feet flat on the ground.
Simultaneously lift your feet off the ground and pull your knees into your chest. If you can, grab your shins with your hands.
With control, extend your legs out without placing your feet on the ground. Be sure to slightly tuck your chin. If you can, circle your arms in a port de bras motion (your arms should be rounded, moving from your shins to above your head).