Hey, I"m almost 53. Last year I tore my rotator cuff in Aikido. My surgeon told me that I had a full tear in my my superspinoutus, and partial tear in my inferior spinotus and subscap. I stopped all training as I could not even do 1 push up.
I had minimal deficits upon the rotator cuff testing. I was having difficulties doing push ups and pull ups but the diagnostic testing my doc did yielded minimal deficits. With that information there and my doc saying I will not ever be able to do martial arts and wight lifting after surgery..I went another route. PRP and HGH @ 2 IU's 5 days a week.
I went with PRP therapy that cost me 2000 as insurance will not pay for the procedure. Had 2 treatments, on at the end of June, and a second in October. I did my shoulder PT 3 weeks after PRP treatment. PRP, you must not do anything with your shoulder for a 3 week period. During this time, I also had bilateral partial knee replacements in July. Anyway, I also got 3 kits of HGH and I started my PT for my shoulder when I started my PT for my knees. I did my PT exercises for my shoulder 3 times a week and now, I can do 30 push ups. I avoid any pull ups as internal rotation of the rotator cuff is something you want to avoid and research! Check out AthleanX on youtube.
First thing first, get into a good PT program. If you have significant deficits to your shoulder with impared ROM, this route may not be for you. Get educated on your injury! PT and youtube videos can really help you understand how to address your shoulder problems.