hear a pop in the arm when lifting. at the time the arm got warm and actually felt good. Like I knock something loose that had been stuck for years. After a few days it was a bit soar then went away except when I move my arm certain ways. That was a couple years ago. Now I got back to the gym and while lifting I feel a stain when the arm is in specific positions. Not pain but soar, a little weaker maybe then it feels like it could be.