Vibration in the back

The vibration feature in the back, seat and footrest is provided by a pulsating motor. The intensity and speed of the vibration varies with each model. Be sure to ask the individual massage chair manufacturer if they offer variable speed vibration or if they offer only one vibration speed. The more variation a chair offers the wider variety of massage options and longer a person can use a chair for more specific soar spots without getting bored of the features.