For Ellie Kielb, a typical Friday consists of getting up early to teach a high intensity interval training class at VASA Fitness in Lafayette before she comes to Purdue University’s campus as a ...

We spoke to exercise experts to find the ideal regimen. Credit...Joyce Lee for The New York Times Supported by By Ashley Abramson Q: How much cardiovascular exercise versus strength training should I ...

So you’ve decided to take a group fitness class. Whether it’s the first time you’re exercising with a bunch of people or you’ve already taken a handful (or even hundreds) before and are just looking ...