Travel through time by lifting like passengers on the Titanic or swimming like the sixth U.S. presidentWhere you’re going, you don’t need a DeLorean. You’ve already got a time machine: your body. With it, you can do battle with medieval knights, walk on the decks of the Titanic, play ball on the White House lawn, or play a round of tennis with Henry VIII. This is how you really sweat to the oldies. Try these workouts from decades and centuries ago to experience what it was like to live—and move—in the past. Your heartrate will go on with the Titanic...