Rapid Release relies upon the science of resonance. Like the piano note vibrating the corresponding guitar string across the room, the target absorbs vibrational energy and oscillates. This is the same principle as the opera singer who can shatter a glass with her voice. Rapid Release operates at a frequency much higher than the competition. Notice the symmetry of high compression waves through healthy tissue. Now notice the lack of waves when Rapid Release is put over chronic fibrous tissue. The energy is absorbed by the denser tissue and it begins to vibrate.
Nogier, Paul (1972). Treatise of Auriculotherapy. Maisonneuve.
Rapid Release elicits the Tonic Vibration Reflex (TVR), quickly relaxing muscles. Vibrating muscles between 100 and 200Hz triggers the Tonic Vibration Reflex. This neurological effect quickly relaxes muscle cramps, spasms and muscle guarding, all the pain that comes with it. By operating in the middle of that band, Rapid Release is unique and efficient in creating this effect.
Cochrane DJ. The potential neural mechanisms of acute indirect vibration. Journal of Sports Science and Medicine 10, 19-30. 2011.