Side bend - Ardha Chandrasana
This is similar to one of the counterproductive Swedish untwisting exercises we used to see. A scoliosis patient performing this exercise would exercise into the existing curve and increase it. It is not recommended even if subsequently done in the opposite direction.
The pure reversal of a cranial curve is ineffective or wrong if the caudal curve is enlarged in the process. Movements to the side must never be bending movements: the body must be inclined but always held straight, starting at the hip in combination with guided rotational angular breathing.