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.

Strengthen and define your abs with this TRX ab workout, designed to target your core and torch calories. Follow along for an effective at-home or gym routine that builds strength, stability, and a ...

The path to core strength is as varied as the number of exercises that build your core system. There are hundreds of exercises from which to select when working to build the core, but this type of ...