World renowned expert in biomechanics of the spine, Dr. Stuart McGill, takes Elitefts™ Sponsored Pro Powerlifter, Brian Carroll, through an exercise to increase Thoracic Spine Mobility.  Poor "T-Spine" mobility can have an adverse effect on other joints of the body and decrease performance.   This can also cause the lumbar spine, cervical spine, and the glenohumeral joints to compensate for this lack of mobility, thus, inhibiting range of motion which can decrease performance and increase the chance of injury.