If you haven’t used a Slendertone product before you may find it an unusual sensation, but a pleasant one. When you start to increase the intensity, you will feel a mild pulsating sensation, followed by a gradual tightening of the abdominal muscles. The muscles should contract smoothly, hold themselves in a tensed position for a few seconds and gently relax again, just like when you are completing a normal muscle contraction.
You can control the intensity of the muscle stimulation via the controller on your belt.
This amusing video shows a group of Slendertone virgins trying our belts for the first time.