The Upper Back Problem Your upper back, the thoracic spine, should be your most mobile spinal region. It is designed for rotation, flexion, and extension. Modern life, with its forward-focused activities, locks the upper back into stiff flexion. The consequences spread throughout your body. These seven signs indicate upper back stiffness. The 7 Signs 1. Shoulder Mobility That Has Decreased Full shoulder movement requires thoracic extension. When your upper back is stuck in flexion, shoulders cannot reach overhead properly. Limited shoulder mobility often originates from thoracic restriction, not shoulder pathology. 2. Difficulty Taking Deep Breaths Thoracic expansion enables full breathing. A stiff upper back restricts rib cage movement, limiting breath depth. If deep breaths feel blocked, upper back stiffness may be preventing full lung expansion. 3. Posture That Rounds Forward The classic hunched posture of desk workers reflects thoracic stiffness. When extension range is lost, flexion becomes the default. No amount of postural effort overcomes structural limitation. 4. Neck Pain That Will Not Resolve When the thoracic spine cannot move, the cervical spine above compensates. This creates neck strain and pain that no amount of neck treatment resolves. The neck hurts, but the upper back caused it. 5. Constant Desire to Crack Your Back The urge to crack your upper back indicates joints seeking movement they cannot achieve normally. The temporary relief of cracking does not address the underlying restriction that creates the urge. 6. Pain Between Shoulder Blades Interscapular pain, the ache between your shoulder blades, often reflects thoracic stiffness. Muscles strain as they attempt to counteract the postural effects of thoracic restriction. 7. Rotation That Feels Blocked Turning to look behind you requires thoracic rotation. If this movement feels restricted, if you turn your whole body instead of your torso, upper back rotation has become limited. Start your 14-day free trial for upper back programs. Upper Back Mobility Exercises Thoracic Extension JME 171 Sitting in your chair, raise one leg up and in front of you. Then, bend at your knee to find 90 degrees and then return to a straight position. Thoracic Rotation JME 170 Find stability by holding onto the back of your chair or desk. Bend at your knee to raise your leg backward - as high as your are able to - and return to the floor. Cat-Cow Movement JME 172 Sitting in your chair, internally rotate your legs toward each other. Be controlled with your movement and find your end range of motion. Freeing the Upper Back Upper back stiffness responds well to consistent mobility work. The thoracic spine, once mobilized, often produces dramatic improvements in posture, breathing, and shoulder function. Daily practice gradually unlocks what desk work locked up. Start your 14-day free trial and free your upper back with simplmobility.