Medical Journal Club article for September 2009:

Exercise and knee osteoarthritis: benefit or hazard? | Canadian Family Physician Journal -

“Knee osteoarthritis (OA) is seen radiographically in 33% of the population older than 60 years of age, and is responsible for a higher incidence of disability than any other chronic condition. It is as potent a factor as cardiovascular disease in limiting activities of daily living in the elderly.”

What is the role of exercise in causing knee OA? ?