Lie on left side with hips, knees and feet stacked one above the other. Hips and knees bent at right angles. Extend arms straight in front of you, pressing palms together. Breath in, brace abs, reach upwards and back with right hand, keeping left arm on floor. Breath out, rotate upper body to face ceiling. Continue until right arm is as far back as possible, upper body facing ceiling, hips still stacked. Hold. Breath in. Breathing out, reach back towards ceiling with right arm, while rotating torso to start position (touch palms of hands together). Repeat. Switch sides.