How Breathing Fights Stress What’s the first sensation you notice in your body when you face a moment of stress? Are you shaky? Does your heart race? Do your palms sweat? Maybe your breath becomes quicker and shallower. These physiological changes are all regulated by the autonomic nervous system, which continually works to regulate heart rate, respiratory rate, and digestion. When we face any stress, whether big or little, the sympathetic branch (better known as fight-or-flight) of the autonomic nervous system activates. Even bad traffic on the way home can cause the release of adrenal hormones into the bloodstream that triggers fight-or-flight in multiple parts of the body. The result can be higher blood pressure, faster breathing, a quicker heart rate, and even elevated blood sugar levels. It might seem like there is little we can do to stop fight-or-flight [...]