This simple technique requires you to inhale with your mouth closed for two seconds. When it’s time to exhale, part and pucker your lips, then breathe out slowly for four seconds. For anyone with chronic obstructive pulmonary disease, pursed-lips breathing can come in handy. Practicing this exercise and taking prescribed medication, available via online ordering, works to decrease the severity of your shortness of breath or wheezing.
Source: floridaindependent.com/anxiety-breathing-exercises-to-try/
