You’re probably familiar with the abs muscles—the ones you see poppin' on celebs like J.Lo or Halle Berry, but there’s way more to core strength than those visible six-pack muscles. Behind the scenes, ...

Eccentric exercise focuses on movements, or phases of a movement, that lengthen the muscles. Some examples of eccentric exercise include lowering into a squat or lowering into a press-up. In contrast, ...

It was such pain that introduced me to these muscles and started me on a journey that meandered from outer space to the inside of a cell. But let’s start at the beginning. It was just an innocent ...