Mid-Back and Shoulder Pain from Computer Work? You’re Not Alone. . So many people come into my clinic not because they’re injured — but because their bodies are tired of sitting. Hours spent working on a computer or talking on the phone can create stiffness through the mid-back and thoracic spine. . It’s not a serious injury, but it feels serious when every breath, twist, or stretch makes you aware of that ache between your shoulder blades. . That’s where the RENPHO Active Thermacool 2 Massage G