Core training has always been part of military PT and fitness testing. From crunches to sit-ups, flutter kicks, leg tucks and plank poses, the U.S. military uses many exercises to test core strength.

A strong core is not only a total flex—literally—it’s key for building total-body strength that carries over into everyday movement. And building one requires functional core training. Functional ...

Get surfer strong with land-based moves that actually work. Surfers always seem effortlessly in shape. Along with sun-kissed skin, they rock that lean, toned look so many of us spend hours in the gym ...

When it comes to building a strong core, most of us think about exercises like crunches, or sit ups. But there is a lot more to core strength than that. One of the main aspects of core strength is ...