Lie on your side with your upper body propped up with your forearm.
Your lower leg should be lying bent on the floor.
Allow your upper leg to be positioned in front of you to help you to lift up into position.
Tighten your abdominal muscles and then use your upper leg and arms to lift your hips from the floor.
You should have a straight line from the tip of your head, down the front of your lower thigh to your knee.
Keeping this straight line with your hips lifted up, remove the support of your upper leg, and hold this position.
You should feel the muscles at the side of your lower hip begin to work harder.
Place your upper leg back on the floor to control the movement back down to the floor, and then repeat.