Secure an electrical stimulation belt around your waist. Be sure to place the area of stimulation directly and evenly on top of your abdominal muscles.
Switch the electrical stimulation device to the "on" position and choose a level of stimulation. Select a low level for the first few times you use the machine, and increase the level once your stomach muscles have become used to the contractions. Make sure that your muscles always feel like they are working from the stimulation, but they should never feel uncomfortable or strained.
Follow the instructions provided with the electrical stimulation belt to see how often it is recommended for you to use the machine. You should work stomach muscles gradually and use the electrical stimulation two to three times a week in the beginning, and then increase the frequency of use to four or five times a week once your stomach muscles strengthen.