This abs workout at home uses a medicine ball to add resistance, rotation, and control to core training. The routine targets ...

Whether you're switching up your typical strength training routine or rehabbing after injury, introducing instability into your workouts will have you shaking and aching like never before. There are 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.