I am 50 years old and generally active however have been limited lately by my knee pain.  My doctor says I have osteoarthritis.  What are some things that I can do to keep my pain to a minimum and keep moving as long as I can?

The current treatment guideline for OA, based on a recent literature review by the American Academy of Orthopedic Surgeons, strongly suggest that you keep up with a good gym program to stay strong, keep unnecessary weight off, maintain heart health with a low-impact aerobic activity (like biking), and correct any faulty biomechanics or strength discrepancies.  You can manage your pain with NSAIDs or tramadol.