The abs and core are the junction at which lower body strength is translated into upper body power. But for that to happen you need strong abs and a strong core. Fab Abs works all of that in a dynamic and static fashion. The cross-mix delivers a potent abs workout that demands you raise your knees to waist height during High Knees and keep your body as absolutely straight as you possibly can during plank. Add EC when you need the extra challenge that will make your abs and core burn.