equanimity

Buddha's Brain: The Practical Neuroscience of Happiness, Love & Wisdom

“Inhale as much as you can, hold that inhalation for a few seconds, and then exhale slowly while relaxing. A big inhalation really expands your lungs, requiring a big exhalation to bring the lungs back to their resting size. This stimulates the PNS, which is in charge of exhaling.”