Let’s begin with full disclosure: I don’t do plank moves very often. I’m keenly aware the basic plank is a terrific exercise for strengthening the core and, so, helping to protect the lower back, but, ...

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. In this article, I ...