"You have Parkinson's disease" transformed Nan Little from a Person into a Person with Parkinson's, setting her squarely on a life path leading inexorably to physical and mental deterioration marked by increasing disability and a painful, possibly demented, end. Although never considered an athlete, upon hearing this diagnosis in 2008 at age 62, she became physically and mentally stronger by setting, and meeting, unexpected goals. Mitigating her symptoms...