Purpose: cervical and upper thoracic stabilization
Mechanism : Sitting on a large gym ball .
Walking the feet forward so the ball rolls up with the back and the thorax is resting on the ball .
The head and neck are maintained in neutral position, and the cervical flexors are emphasized.
Then walk the ball farther, so it is under the head.
The extensors are now emphasized.
The patient walks the feet forward and backward.