Limited mobility of the thoracic spine is a common finding and something that tends to get worse over time. To me, it's one of those "use it or lose it" types of mobility in the body. Several issues can occur from limited thoracic mobility, such as shoulder, neck, and even low back pain.
Thoracic mobility drills are common, but only part of the puzzle. I have a new presentation where I'll be reviewing some of the self mobility, manual therapy techniques, and corrective exercises I use to enhance thoracic mobility.