An abdominal roller is a simple training tool, but don’t let that fool you. Using an ab roller not only works the abdominal area but also all the supporting muscles around the abdominal area, like your lower back, hip flexors, shoulders, arms, lower chest, and obliques.
This unique options allows you to add more variation to your ab workouts. You can roll out into a Y-shape configuration, allowing to target even more muscles and building up those stabilizing muscles you otherwise couldn’t with a single abdominal wheel. Using two wheels is far more difficult that using a single wheel.