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 ...

Add Yahoo as a preferred source to see more of our stories on Google. Fit & Well fitness writer Harry Bullmore performing a bird dog as part of the McGill Big Three core exercises. Millions of people ...