The hump in the thoracic spine is not “natural”; it is caused by poor posture. It is a secondary condition. It is preceded by shortening of the muscles on the front of the abdomen. If “the shoulders” are chronically pulled upward and forward, the rib cage collapses. This causes the pectoralis minor, the intercostal muscles, the thoracic muscles, the muscles that support the ribs, and, in most cases, the abdominal muscles to shorten.
Over time, this shortening in the front causes the back to round. The widow’s hump (see cervical vertebral deformities) also begins with a sinking of the chest. Conversely, on the path to healing, everything that has shortened must be “lengthened” again. The sternum, clavicles, and all the muscles of the chest are incorporated into all exercises. This consistent stretching of all structures allows the spine to straighten, and the hump returns to its normal position.
The older the hump (the hump, not the person), the more challenging it is to remove it. Challenging, not impossible.