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Associated Press
In this Tuesday, Dec. 11, 2012 photo, Zendi Solano, left, stretches with her running club in Pasadena, Calif. Dr. Robert Sallis says doctors with Kaiser Permanente, one of the nation's largest nonprofit health insurance plans, generally prescribe exercise first, instead of medication, and for many patients who follow through, that's often all it takes. (AP Photo/Mark J. Terrill)

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