Considering a new fitness challenge? Experts say there are benefits — but it's not for everyone. (Getty Creative) If you’re not a workout buff, is diving into a fitness fad going to be a game-changer?

The trend that dominated social media a decade ago — and raised millions for A.L.S. research — has been reborn as a vehicle to raise mental health awareness. By Madison Malone Kircher Is it déjà vu or ...