Lie on your side with your legs straight, one on top of the other.
Lift yourself up on your side using the lower arm with the forearm on the floor.
Your hips will come up off the floor until your body is a straight line from your head to your feet.
Lift your upper arm directly up so that it is in a vertical position.
Maintaining control with your body, lift your top leg up and down.
Do not allow your body to sink or wobble too much.
Relax and repeat.