Add Yahoo as a preferred source to see more of our stories on Google. Woman doing bicycle crunches. Not all ab exercises are the easiest – take crunches, for example. They require a certain degree 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 ...

Core muscles are used by everyone all day, every day, so keeping them in peak condition is important. Your core encompasses numerous muscles, Nataly Komova, a fitness and nutritionist expert at ...

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 ...