Kneel with your upper body resting on the ball.
Place the back of your hand gently on your lower back.
Gently tense your bottom muscles, keeping your hamstrings relaxed.
With your hand resting on your back, gently pull your shoulder blade and elbow backwards. Maintain a stable thoracic spine, using the muscles around your shoulder blade.
As you develop strength, slightly twist your upper body while keeping your low back stable.
