6,000-Year-Old Knee Joints Suggest Osteoarthritis Isn't Just Wear And Tear

Guess what, exercise doesn't cause arthritis. Lack of exercise plus processed food does. According to a study published in this week's Proceedings of the National Academy of Sciences.

"Conventional wisdom is that osteoarthritis of the knee results mostly from wear and tear, which is why, these days, it's more common among older people and those whose excess body weight puts extra stress on those joints."

"Your joints aren't just like your automobile tires that wear out as you use them," he says. In fact, exercise helps nutrients diffuse into cartilage in the knee and keep it strong and healthy."

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Read the article from NPR.