Runkeeper was placed on Earth by supreme beings of some sort. Its programmable, GPS-tracked interval runs make the iPhone into a serious, and entirely thoughtless, training tool. But Runkeeper’s ...

High-intensity interval training involves performing an all-out, exhaustive physical effort for a short time followed by a short (sometimes active) recovery. Its benefits are clear: Effective HIIT ...

Add Yahoo as a preferred source to see more of our stories on Google. High-intensity interval training (a.k.a., HIIT) is a triple threat: “It’s quick, easy, and effective,” says Angela Gargano, a ...

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. High intensity ...

Only have a short window to fit in a workout today? No worries. In just 10 minutes, you can get your heart rate up and strengthen your abs with this two-for-one HIIT ab workout. Reminder: HIIT stands ...

Nick Blackmer is a librarian, fact-checker, and researcher with more than 20 years of experience in consumer-facing health and wellness content. Doing HIIT workouts can improve your cardiovascular and ...

DENVER — Being stuck in your house does not mean you still can't complete a full-body workout. As a certified personal trainer, I've redesigned all of my workouts for my clients and members to fit ...

High intensity interval training (HIIT) can offer significant health benefits to people with weight loss goals by burning more calories, reducing body fat, and improving general well-being. HIIT can ...