When dealing with clients who have scoliosis you need to take a few things into consideration. We need to work on muscles as stabilizers to develop the tonic holding of the spine. The reason for this is because the muscles on the convex side of the curve tend to be stronger than the muscles on the concave side of the curve. The idea is to balance out the muscle strength on both sides of the spine as best we can. We want to try to develop mobility through movement by doing exercises such as side bends and side twist. We want to follow the strucutre of the skeleton, therefore, we need to avoid correcting head and scapuluar position to neutral if TSP is assymetrical because corrections may lead to impingement syndromes, neural issues, and spasms. You want to have your client practice symmetry of exerices or asymmetry, and it is important to focus on quality of the movements not quanity. You also want to avoid prolonged passive stretching of the spine.
When designing your program try to support the skeleton with core muscles and optimal functions of the body. You want to help your client devleop tonic control and support of the spine, pelvis and scauplae. If it is possible to correct the curvature of the spine you want to do it by development of the muscular system. Breathing exercises to mobilize the thoracic spine and ribs will help and add asymmetry to exercises.
– Canfit Pro Conference, Stott Pilates Scoliosis Management Lecture Notes, Aug. 2010