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 ...

Cardio exercise, also known as aerobic exercise, are those that increase your heart rate and breathing for a certain period. It helps to improve your heart, lung and circulatory health by increasing ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Looking for a low-impact way to get your heart rate up, without braving bad weather or sacrificing ...

Plus, the surprising benefits of turning the intensity down a notch.

Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. So where should you ...

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 ...