2 Quotes by Anders Olsson

Although our brain and nervous system only represent two percent of our body weight, they use a full 20 percent of oxygen we consume. When our breathing is dysfunctional oxygen supply is limited, and the conscious mind will work a little slower and perceive incoming stimuli as slightly more stressful and threatening

Impaired breathing, such as short and forced exhalation, makes the sympathetic part more active, resulting in shallow breathing, a tense body, increased stress, and fight or flight behaviour.