I had a rotator cuff injury a couple of years ago, along with wear and tear from 20 years of this shit. Long story short, my shoulder bothered me for a good 1.5 years after the injury and still isn't 100%, but I noticed a drastic improvement after a few months of the following:
- reduced the weight I was doing (thanks to covid and no gyms, the most I can do for chest press is 2 x 75 lb dumbells... and my cable machine which goes up more but I use it for flies)
- Don't do any more shoulder presses, ever
- Before each workout, I use those elastic rubber tubes to pump up and improve blood flow, especially for shoulders. I do various side laterals, circular motions, and front raises with the green tube.
- Exercises that hurt, I did with the rubber bands/tubes until I was able to move back to free weights.
- I started taking a Creatine + Glutamine blend ( I think this helped a lot)
- Take Calcium + Vitamin D
I'll tell you what, I haven't lost any size. In fact, I've increased size in my chest & shoulders because I can now work out without pain and actually feel the muscle and contract it. Before, everything hurt, so even if I did heavy weight, it felt like I was working out my joints and tendons more than the actual muscle. I realized I didn't need to do hundreds of lbs of weight. I've always felt moderate weight lead to better pumps and more burn than heavy weight.