Adolfo Calenda, 71, worked in construction for decades before retiring in 2006, and he knew that the job had taken a toll on his body.
But Calenda didn’t use that as an excuse to be sedentary. Until his late 60s, he played tennis with friends about twice a week, and enjoyed gardening on the one-acre property he owns with his wife, Joy. And he would often start the day with a walk around a local lake, “to keep the muscles loose.”
All that changed two years ago, when the frequent pain in his left knee got worse. He had to quit his regular tennis game, because his knee would ache for days afterward. “It wasn’t worth it,” he says.