“Artificial knees, a couple of spinal fusions, a new hip and bilateral carpel tunnel can't prevent Cecile Beecroft from exercising regularly. If anything, the diagnosis of osteoarthritis 25 years ago galvanized her resolve to stay active. ‘The only reason I'm upright and mobile is exercise,’ she says. ‘If it weren't for the exercise, I wouldn't be able to move.’ Finding out she had osteoarthritis at age 32 made Beecroft of Sioux Falls realize that regular activity was the only way she would be able to participate in her life. Exercise keeps your joints moving and your body limber, the 57-year-old says.