If you’re cleaning up cartilage, you’ll want to be very careful to not re damage the freshly resurfaced area. 20 years ago I had two shoulder surgeries 12 months apart, both on the right shoulder, the first was to repair torn labrum, torn rotator and a grade 2 separation of the A/C joint, the second was a resurfacing of the head of the humerus due to damage caused by returning to sport to quickly. Long story short I was cleared by both school doctor and athletic training staff to return to training 12 weeks post surgery number 1, with zero restrictions. I did ease into things, but it was un supervised and I ended up re injuring the soft tissues. After the second surgery I was allowed to do ROM exercises and MINOR stretching supervised by an athletic trainer after the first 3 weeks, 12 weeks after that I was cleared to return to body weight exercises and non impactful movements. When they have to clean soft tissue up, it’s very easy to re injure, so they maximize recovery time. A good example is my recent hip replacement, I was up and walking again with weight on my replaced hip immediately after surgery… a hip resurfacing you do not put any weight on the resurfaced hip for 8-10 weeks to minimize risk of re injuring the soft tissues.
ROM exercises for your shoulder so you can gain as much of that back as possible are good, wall walks are the best, and minor stretching to allow some of the swelling and tightness to leave the area quicker. HGH is a good route to help rejuvenate everything, I find Nandrolone helps too.