On the advice of a co-worker, Dehne joined a six-week program through which she learned how to safely walk to ease her pain. Now Dehne briskly walks for exercise and enjoyment multiple times a week. Her knees, she says, "don't hurt me anymore."
Eamon Queeney for NPR
Arthritis is a joint disease that can cause cartilage destruction and erosion of the bone, as well as tendon inflammation and rupture. Affected areas are highlighted in red in this enhanced X-ray.
Philippe Sellem/Paul Demri/ Voisin/Science Source