Lie on your back holding a stability ball on your tummy.
Bring one leg, and then the other leg up to 90 degrees.
Both hips and knees should be at a right angle with the stability ball resting against your thighs.
With your arms straight, place your palms onto the other side of the stability ball.
Tilt your pelvis forwards and backward until you find the neutral position with your spine.
There should be a small arch in your lower back.
Applying some gentle pressure into the ball with your stationary arm and leg, extend your other leg and the opposite arm away from one another.
Ensure your back remains in the same position.
Bring your arms and legs back up to the starting position and repeat with the other pair.