Lie on your side and stretch out the arm that is beneath you. Support yourself with your other arm, ensuring that your elbow is at chest height; bend the leg which is touching the floor. Lift up your other leg, stretch it out and rotate it in small circles. Ensure that you tense your pelvic floor, pull in your belly button and continue to breathe calmly. After a while, circle your leg in the other direction. Then change sides.