His approach to shoulder training might be of interest too if one of your injuries is shoulder related
But to take an example, there's not much you can do to rehab a partial TFCC tear in your 40s. There just isn't enough blood flow. I could get surgery, but my TFCC is already better than 90% of surgical outcomes.
It rarely affects me in daily life, but I can't train wide grip bench presses without immobilizing the wrist with a steel brace.
Once you hit 40, you can still get strong. But sooner or later, a doctor's going to sit down with you and say, "There's nothing I can do to fix this that won't make things worse."
But as another doctor told me, "Look, you have a choice. As you age, you can spend too much time talking to your orthopedic surgeon, or too much time talking to your cardiologist." Physical activity is essential, but it comes at a price. Staying as injury-free as you can manage is everything.