I also have kneemonia, or kneesles as some like to call it, and rationalize that pain is a thing of the mind. So far it is not that bad that I feel it is worth changing my lifestyle, when it does, then how far am I prepared to let it go? I have decided that my knees are not going to control my lifestyle as far as I can manage.
I remember as a kid I met this guy the age of my grandparents, a bit of wild one. He was a South African who was also a RAF piloting spitfires in WWII. He happened to love motorbikes as well. Told me the story how he was riding along and sideswiped a car coming the other way, connecting its bumper with his knee. Told me it was the most painful thing of his life. Laughing he said the force transferred down his leg and broke off the footpeg. He still walked okay albeit a bit funny. told me it never stopped him, and it did not.