And, as with anything in the body, it isn't always as simple as that, as the lats and connecting thoracolumbar fascia can also play a role in indirect stability to the SIJ (breakingmuscle.com)
If you have a right thoracic or right thoracolumbar curve, place a folding chair a few inches past your left foot. (yogajournal.com)
If you have a right thoracic or right thoracolumbar curve, reach out toward an imaginary chair and then bring your right hand down to your shin. (yogajournal.com)