Hold the Ab Roller with both hands and feet on the floor.
Now place the ab roller on the floor in front of you so that you are on all your hands and feet (as in a plank position but with your back bent). This will be your starting position.
Slowly roll the ab roller straight forward, stretching your body into a straight position. Go down as far as you can without touching the floor with your body. Breathe in during this portion of the movement.
After a pause at the stretched position, start pulling yourself back to the starting position as you breathe out. Go slowly and keep your abs tight at all times.