Pickleball is the fastest-growing sport in America, in large part because it is so accessible. It seems like everyone can play it, regardless of age or athletic ability. Bursts of high-intensity effort during a game, however, can lead to injuries. Overstretching to reach a ball, taking a tumble during a point, or not adequately warming up before a game is all too common. While it is easy to pick up a paddle and learn to play, it can be challenging...