Until a few years ago, I was thin but unfit. Literally clueless about what to do in a gym. Then metabolism hit me in the face (actually, my waistline), and I had to learn the ins and outs of fitness ...

Celebrity fitness power couple Chris and Heidi Powell show us some basic boot camp moves to do at home in Yahoo Life’s fitness series, “Take 5.” This five-minute workout routine is designed for ...

Ready to transform from a rookie fitness enthusiast to a beast in just 12 weeks? Follow this guide. Muscle building should ...

Weight lifting for beginners is daunting for most. Easy ab workouts, easy chest workouts, and beginner back and leg exercises provide a great foundation. If you're hoping to bulk and broaden your ...

No equipment needed ...

Core strength goes deeper than aesthetics — it’s essential for preventing back pain and injury and improving sports performance. This beginner ab workout will get you started. Nearly every movement ...

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. While plenty of ...

This article was reviewed by Craig Primack, MD, FACP, FAAP, FOMA. “Right to the core,” “core values,” and “hardcore.” These little idioms highlight just how vital the concept of “core” is in our lives ...