How Well Will You Age? Check Your Grip Strength

During a Zoom interview, Maury Purnell, 85, hangs in the air, firmly grasping a trapeze bar, answering questions and smiling, no less. He manages it all in a plaid button-up shirt instead of gym clothes.

“Several of my peers are having health issues,” he says. “I’ve been fortunate with all of that in recent years.” Purnell is enjoying unique health for his age, and research shows a clear relationship between what he’s exhibiting right now—impressive grip strength—and longevity. “It’s...