In the early 1980s, I would routinely walk up the escalators, including stopped ones, on the deepest Washington Metro stations. In the 2010s, I take the elevato

In the early 1980s, I would routinely walk up the escalators, including stopped ones, on the deepest Washington Metro stations. In the 2010s, I take the elevator two floors. I walk several miles per day, I run varying distances each weekend, but something in one knee doesn't like stairs these days.