If you equate step aerobics with leg warmers and spandex, well, you’re not wrong—but you’re stuck in the 1980s version of it. As TikTok videos that have amassed millions of views show, the retro ...

NOTE TO READERS: "Stretching Out" now runs in print on Sunday, in the Sports section. I should have known a class called “Caribbean Cardio” wouldn’t be easy. Vacation is always hard work. Even as he ...