Hello Mrs. Heidi, very sorry to hear of your health troubles. I used the knee walker for several weeks, off and on. When I first had the original foot surgery, I never in my life dreamed I would have three more foot surgeries. Just when I thought I was out of the woods and starting to walk little, by little is when I starting feeling the pain in my good leg/knee. I was very disheartened to hear that I would have to now have surgery on the very leg that I had come to depend on. No one ever mentioned to me that this could become a problem. The very original knee walker that I had for a very short time was an older model that did not steer and had the brake on the right side, so as I used my right leg to walk, it constantly bumped against my good leg, causing it to be black and blue. Not pretty. I wasn't walking far at all. I just used the walker to get around the bottom floor of my home, very small, to go to the doctor and to run a couple errands to grocery or drug store. Never went on long walks. I do so hope the best for you and hope that since you have been on it a such a short time that you will be able to get back to the aerobics that you enjoy
As for me, the meniscus tear was repaired, the hairline fractures will heal, but the damage to the cartillage is the problem and because of that, the doctor said he does not recommend that I ever go back to long walks. Only light bicycling and water aerobics. Just try to remember to go gently with the walker and not to overexert your good leg. One way of looking at it is if you were to put your car in reverse and throw it into gear, rather than gently applying the brake and then going forward, you would wear out your transmission. Just a thought
If my posting here helps anyone to avoid this unfortunate outcome, I will be happy. Best of luck to you for a full recovery.