I discovered spin classes a decade ago, and subsequently got certified to teach them myself. In the years since, I haven't focused on other kinds of cardio group classes—but for a time, I was obsessed ...

Want to boost your fitness without leaving the house? Discover the 10 best home cardio exercises, expert tips on fat loss, ...

Randal Claytor is an associate professor of kinesiology, nutrition and health at Miami University. When you enter the gym, which way should you head first? Toward the treadmills and spin studio to get ...

Lindsey Ellefson is Lifehacker’s Features Editor. She currently covers study and productivity hacks, as well as household and digital decluttering, and oversees the freelancers on the sex and ...