The focus of this exercise will be on the External Obliques. The
External Obliques, when stretched over the AbMat™, assist the Rectus
Abdominus when doing the basic sit-up. To focus more directly on
the External Obliques you simply allow them to pull in a straight
line. The effect of the EO pulling in a straight line will twist
the body. Figures 1,2,3,4 demonstrate this.
If you simple want an exercise to isolate the External Obliques
follow figure 1 and 2, then lie back down to the starting position.