Start on your hands and knees with your hands under your shoulders and knees under your hips.
Find your neutral position with your spine and head.
Push the heels of your hands into the floor so that your shoulder blades flatten against your back.
Tighten your abdominal muscles to help stabilise your trunk as you slowly straighten one leg out behind you.
Keep your foot in contact with the floor throughout this movement.
Do not allow your hips to rotate with this movement.
Control the movement as you bring your leg back in to the starting position.
Ensure your back and neck remain in the neutral position throughout, with your shoulder blades controlled.