Strengthen more than just your core muscles with the humble-yet-mighty plank.

Editor’s note: Dana Santas, known as the “Mobility Maker,” is a certified strength and conditioning specialist and mind-body coach in professional sports, and is the author of the book “Practical ...

A strong core isn’t just about cranking out sit-ups. Sure, they’re a classic ab move, but if you really want to strengthen your midsection and keep your waist looking nipped yet strong, you’ll need to ...