HOW: Get set-up laying flat on your back with your knees bent and feet supported on the ground. Place your hands on your hip bones to help with learning body awareness. Perform and maintain a small amount of posterior pelvic tilt prior to starting. While keeping the rest of your body still, slowly let one knee fall out to the side within your range of motion, then return to starting position and repeat.
FEEL: You should feel motion strictly at your hip joint. You should feel like your stomach muscles are helping to keep the rest of your body still.
COMPENSATION: You should not feel like your back or your pelvis are moving excessively, resist arching your low back.