The phrenic nerve controls the diaphragm, the dome-shaped muscle that is primarily responsible for breathing. Contraction of the diaphragm expands the lungs and draws air into them. The phrenic nerve ...

Errol Doebler, onetime Navy SEAL and FBI agent, has used breathwork throughout his career. From surviving SEAL training and special operations with the 75th Ranger Regiment in Afghanistan in 2010, to ...