Automatic Rebound Abdominal Training RollerAn Abs Roller is a simple but effective fitness tool for strengthening and toning the abdominal muscles. It consists of a cylinder shaped device with two wheels on either end, which allows for smooth and controlled movement. The user kneels on the floor and holds onto the handles, then rolls the device forward and back to engage the abs. This particular model, the "Automatic Rebound Abdominal Chakra," is double wheeled for stability and features a