Barre doesn't always have to be low-impact. In this 15-minute workout, M/Body founder Marnie Alton amps up the intensity of your typical barre workout with bursts of feel-good cardio. While you'll ...

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. I just learned that ...

Break a sweat, then you're done - that's how the 15-15-15 workout goes. At least that's what it feels like. This is the way to exercise for anyone who'd rather be doing anything else than a cardio ...