Limited internal hip rotation has been associated with lower back pain as the lumbar spine is subjected to rotational motions it is not designed for. Using Core-Tex in a functionally loaded position, can produce immediate results in internal hip rotation range of motion.
You can't treat thoracic mobility like hip, or shoulder or ankle mobility. The hip, shoulder and ankle are individual joints. The thoracic spine is major body segment with multiple joints involved, plus the neurologically sensitive diaphragm.