Whats are the best exercises to strengthen the rotator cuff with a slight impingement. I can more or less only feel discomfort when moving around the arm when cold and only then it's very minor, the pain/pinching is felt when arm is say 80 degrees or higher, more so if the elbows are in line with the body. I have been doing basic 1 arm on knee external rotations (these twinge a little on the first couple of reps) and kneeling rotations arm flat against side rotating outwards with a cable (these don't seem to cause any twinges but it may just be because I am warmed up). I've lowered pressing volume to about 1/3 of my back work and have eliminated vertical pulling movements for now (I get minimal if any discomfort pressing in this manner).
Are the 1 arm dumbell external rotations contraindicated if I am getting a slight twinge in the shoulder doing them? Would anyone know a decent exercise progression to treat impingement syndrome? As I said it's fairly minor, I have no loss of strength and full ROM (with slight pain) but I dont' want it to get worse.