Getting Older

So for a long time I knew that my knee wasn't going to last forever. When you have a partial prosthetic put in at 17, you know these things. At my medium -ish age I shouldn't be taking it "easy" and having 'bad days' with arthritis. The way I see it I should get credit for time put in and get a new knee sooner. That way I can do what I love......Ironman races! I only say this since I am having some sore knee days more and more lately. :(