I asked fitness expert Dr. Femi Betiku to share more about the problems with a weak core for runners. A weak core means a ...

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.

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 ...

Back in the day, sit-ups were the exercise of choice to train the core. We didn’t use the term “core” back then, but if you wanted the kind of abs displayed in Calvin Klein underwear ads, sit-ups were ...

You’ve probably seen it all over your feeds: Fitness pros and physical therapists talking about “training the deep core.” But unlike crunches or Russian twists, these exercises don’t come with a pump ...