Our last ab muscle to discuss is DEEP...
Transverse Abdominis
It's THE deepest layer of abdominal muscle; wrapping all the way around the torso from the ribs (top) to the pelvis (bottom). The muscle fibers run horizontally and act like a weight lifting belt. It's so deep you cannot touch it from the outside the way you can touch the rectus abdominis or the external obliques.
This set of muscles doesn't move the spine or pelvis but does help with breathing by providing forcefull expiration of air from the lungs while also stabilizing the spin. This powerful layer of muscle also helps to compress the internal organs.
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