I've been experiencing some mild musculoskeletal pain in the chest/thorax area for a little while, and I'm wondering if there are specific exercises that could develop the area and eliminate this annoyance? I used to lift a lot of heavy weights (I had a very strong chest) for my pecs and never really did any kind of stretching or warming down, so I tend to think that might have caused this, but I can't be sure. In case anyone's going to bring it up, no... it's not a heart problem. I know for a fact that it's related to the muscles and/or the ligaments and bones. It doesn't stop me from doing anything, but a dull ache once in a while gets annoying. Any thoughts?