The transverse abdominis supports the spine and the way we hold our bodies, but it's often neglected. Here's how I learned to engage it.

Core workouts should be about more than just trying to get six-pack abs. In fact, working your deep core—not just the top ...

which is a tendon that runs vertically from ribs to the pelvis and separates the right and left sides of the superficial rectus abdominis muscle, and the pubic bone (pubis). By flattening the ...