A furniture item includes two massage elements that are each operated to generate a vibration that can be transmitted into the furniture item, where the vibrations create a joint vibrational wave. The frequency of each vibration can be continuously varied within a predetermined frequency range. The shifting frequencies of the massage elements cause the peaks and troughs of the wave of the vibrational wave to move across the furniture element to create the sensation of a moving vibration for a user resting on the furniture item.