Is it just me, or are exercise bikes having a moment? It seems like everywhere I look there are Peloton commercials, Soul Cycle billboards, and ads for eBikes on my Instagram feed sandwiched between ...

Most gyms have an elliptical machine, otherwise known as a cross trainer. And chances are, someone's on it—and using it incorrectly. Sounds good, right? Ahead, fitness experts weigh in on everything ...