Then I had rheumatoid arthritis. The drs called it osteoarthritis and said it was caused by overuse and that I needed surgery. I could not stand and could barely walk, I could not swim.....my knees were swollen and they said I had water on the knee. i received every diagnosis in the book! Now I am so much better. Cheats bring back the pain. And, perhaps much of socalled "osteoarthritis " is actually an auto immune response, and not a case of "over use"???