Wow, that's pretty interesting! No wonder my knees have begun to hurt me the last year, I've gained about 20 pounds. It's really not pleasant to have hurting knees all the time especially when I walk everywhere. I guess I have to make a serious effort to lose weight. The only thing is, even if I lose weight will my knees get any better or am I doomed now to suffer with aching knees all the time (indefinitely)?