For years now, my back around T4 and T5 gets sore on occasion. In most cases, it is due to some change in posture or holding a bad posture for far too long. This could either be from how I sleep in bed or even sit in a chair in front of the computer.
When I was a kid, doctors did say that I have slight scoliosis issue. I have never gone back to really check into that and to see what remedy may work in my situation. Perhaps this soreness is a build up of bad posture and an abnormal curvature over time.
At Spine Universe, there is an interesting article called Take Charge of Your Upper Back Pain that touches on pretty close to what I am experiencing. In addition to keeping the area stretched, you can build muscle mass in the area using some type of Row exercise. For example, a Dumbbell Row.
It's about time that I return to Chung Shan Hospital where I originally had leg surgery and have them do a thorough check on how my exercise program has affected my leg and my back. Maintaining a running program on a previously broken leg seems to be a scary thing to do. But, I'm coming close to two years doing it and so far my leg hasn't felt any worse than it did previously. In fact, it feels stronger. Nonetheless, it's better to be safe than sorry for these kinds of things.

