Resonance breathing is a light, slow, and natural form of breathing that slowly reduces anxiety. It is also known as coherent breathing because of it's consistent nature. The term resonance comes from a term used in physics, which is oscillation. The resonance frequency describes the frequency of an oscillation that allows the oscillator to express maximal amplitude. Oscillations happen in all living systems, whether it is heart rate, blood pressure, or metabollic activity. Breathing is actually one of the rare oscillating systems that is under our control, and therefore, we can optimize it. Resonance breathing is the breathing technique that regulates the oscillation of breathing in a way that achieves the resonance frequency. This optimization also applies to oscillating systems that are dependent on breathing. This breathing technique has a regulating affect on the autonomic nervous systems and other mechanisms like the circulatory system and hemodynamics (which both oscillate and depend on breathing).