98, 99, 100…you mutter through pursed lips, before collapsing flat on your back on the gym floor. Your core crunched to oblivion, your hip flexors probably firing on all cylinders and your neck a ...

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 ...