When under stress, the sympathetic nervous system is stimulated, which is associated with stress-related symptoms such as faster breathing, heart-rate elevation, irritability, elevated blood pressure, anxiety and muscle tension. That part of the nervous system is what is known as the fight or flight response. Slowing down and engaging in deep breathing may help reduce stress and other stress-related symptoms you may be experiencing.
You may do this exercise with your eyes open or closed. Do what's most comfortable for you. You may do this exercise when experiencing a stressful event or as a regular practice 15-20 minutes everyday.
Here's how you do it: