Dr. update

I went to the doctor two days ago for my knees. They took some x-rays. He told me that as young as I am, I've got some really bad knees. Even with the dancing and running I've done, it wouldn't have done as much damage as I have. He showed me the x-rays where he can see the arthritis starting. My femurs are squared off on one side instead of being rounded. I've got the beginnings of a bone spur on one the right one (I think). My self-diagnosis of chondromalacia was correct, I've got softening of the cartilage under the kneecaps. I'm going back today for the physical therapist to show me some exercises to do at home that will strengthen my quads and help stabilize my kneecaps which will hopefully cut down on the pain. I asked about the running, and he said that I could safely continue to train for the 10k and even a half-marathon, but that I might want to reconsider running marathons. He said my knees were only going to get worse, but he couldn't say if it would be in 5-10 years or 20-30 years. I have a life goal of running at least one marathon, so I think I'm going to do that, and then maybe cut back depending on how my knees feel. My boss here has bad knees too, and he's given me a lot of homepathic things that he has used with success so I'm going to try some of those too.