Our spines are made up of a series of 33 bones called "vertebrae." When you move your back, these vertebrae flex together as one, in a curved motion. This movement is very different from the movement of other bones in our bodies which pivot from one joint—like the knee, elbow or wrist. Our spines don't pivot. Instead, through the series of vertebrae, our spine flexes in a naturally curved rocking motion.
The secret to the effectiveness of the Ab Roller is the patented "Arcuate Rocker System." This patented technology is only available on official Ab Roller and Ab Trainer workout products.
The Patent that Protects You
Our patented Arcuate Rocker System comprises of a curved rocker design that serves a double function:
1) It provides support for the head and neck during your ab workout, and
2) It guides your spine through a natural curved movement (this is called "spinal flexion")
during your ab workout.
The patented Arcuate Rocker System available in our entire Ab Roller product line ensures that your spine will never "pivot" during your abdominal workouts. The Ab Roller will always make sure that your spine moves in a curved motion the way nature intended, because the Arcuate Rocker System literally mimics spinal flexion.