The signs were there but subtle. Dustin Chandler never did his homework. He was labeled lazy at school. It wasn’t until years later when his mother, now working at a pediatric clinic, watched him ...

These over-50 champs—and a growing body of research—show what we gain by staying active later in life. Nora Langdon, 82, started powerlifting in her 60s and quickly got hooked. Over the past two ...