Runners know core work matters, but most routines miss the mark. A new study on neuromuscular activation points to a simpler ...

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. That’s why building one takes more than just aesthetics-focused abs ...