Are pull-ups hard on shoulders? I've had a little right shoulder soreness and so took a rest from upper body exercises (including pull-ups) when weightlifting yesterday. Normally I would do 2x5 pull-ups and 2x5 chin-ups. Today in the water my right shoulder felt better. I have no problem altering my routine or switching to an assisted pull-up machine for a while. I have also started doing the external shoulder rotation exercise with a stretch cord, which I slacked off for a few months because my shoulders felt fine.
I probably shouldn't complain much, because my left shoulder feels completely fine, and that was the one that would get a little sore at times last summer.