As a pediatrician, I get this question all the time—“Should my child focus on just one sport?” Whether you’re raising a soccer enthusiast, a future tennis champ, or a devoted gymnast, it’s natural to wonder...

As a pediatrician—and a parent—I’ve seen firsthand how deeply kids can feel the sting of losing a big game or match. Whether it’s the championship soccer game, a swim meet they’ve trained for, or a...