I’ve been doing a lot of work to strengthen my legs lately; the move that has made the biggest difference is the hamstring ...

There really isn’t one portion of our body more important than the rest when it comes to muscle groupings. But because each section has so many functions the levels of individual importance is endless ...

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. For strong, powerful ...