Researchers redouble efforts to understand, improve elders' mobility problems – SunHerald.com Researchers redouble efforts to understand, improve elders' mobility problemsSunHerald.comThe 86-year-old Newton grandmother hits the gym five days a week, plays tennis one or two days, and still works part time managing her family's real estate business. Longevity tends to run in Selenkow's family — […]