Your question, "How does a non doc like me know how much is too much?" is a constant puzzle to those of us trying to maintain or regain health, strength or flexibility. As a veteran of ortho surgeries in the double digits, as well as assorted injuries over many years, I think I have found my personal "sweet spot." I am currently also receiving PT for chronic pain, and it also aligns with what we are trying to accomplish.

I try to work hard enough to know I am pushing myself, but not as hard as I would have in my younger days when I was focused on impressing someone or trying to meet some arbitrary number goal.

In terms of machines, today I set them so the first five reps feel almost easy, then focus on form and breathing, and continue until fatigue hits. Rest a minute or two then repeat. I know I have done enough if I can't do quite as many on the second set. Doing this consistently results in slow but apparent progress without injury.

28 years ago, when I was in my 40's, I had a full ACL/MCL repair & graft after a sports injury. 3 weeks later, I was SURE it was a bad mistake. But 6 months of diligent therapy, and I could go back to everything I used to do - even court sports (where I was injured) - this would not have happened in the "metal monster" I had to wear before surgery to stabilize the joint. I can assure you I don't regret it - and now I know when the time comes, it will be replaced.

Remember, most joint replacements are done on people who have been limited by pain and a failing joint for a long time, and the ortho surgeon's goal is to get them back on their feet. Many have little experience with those of us who are eager to get back to being really active. In your place, once the surgeon said the joint is healed, I would rely on the sports doc and PT to guide my exercise regimen.

Sue