I have been training for over 30 years. Some of my joints have caught up with me over the years. I've had two pectoral tears, not complete tears, ligament and all, but partial tears, which are the worst IMO, because there is NOTHING you can do about it and you're left with a permanent dent in the torn area and the days of a shapely & symmetrical chest are gone forever. It also knocked 100lbs off of what I can press forever.

Here's my current delima. My right shoulder is fucked. For a few weeks, I could warm up and the pain would ease up and I could get through the workout. Most of the time I would just have to struggle through the pain, but I could get it done. But, it's getting worse now, with each workout. I tried the hammer-strength incline, decline, and bench press, and I can't even push that first couple inches to get the lift started with my right. My left is fine. But, yesterday I noticed that when I tried to push through the pain, it actually felt like something was about to give out if I continued to push through the pain. The pain feels like it's deep inside the joint, even slightly behind the right shoulder blade.

My question is would it make sense to work chest, shoulders, and back, using only my left arm for a while until the problem can be fixed? Is it possible that some of the exercise could carry over to the right side? Would it be worth it, only working one side of the muscle group until finding a fix for the shoulder pain?