Spire is based on psychophysiology—how the brain and body interact. Your state of mind causes a cascade of physiological and hormonal changes throughout your body. In short doses, these are normal and beneficial. However, when experienced constantly over time, stress can become chronic and result in lasting damage, impoverished cognitive execution, irritability, and a host of other issues both cognitive/emotional and physical.
Respiration is one physiological function that is affected by a change in your state in mind. Luckily, this is a two-way street. Respiration can be consciously altered to influence your nervous system. Very few behaviors are affected by both conscious and autonomic control (blinking, facial muscles, and a couple others) but breathing is unique in its intricacy and influence.
Read more about the science behind Spire here: www.spire.io/science