Practising this technique 4 to 5 times daily can help. Here's how to practice pursed-lip breathing: While keeping your mouth closed, take a deep breath in through your nose, count to 2. Follow this pattern by repeating in your head "inhale, 1, 2." The breath doesn't have to be deep. A typical inhale will do. Put your lips together as if you're starting to whistle or blow out candles on a birthday cake. This is known as "pursing" your lips. While continuing to keep your lips pursed, slowly breathe out by counting to 4. Don't try to force the air out, but instead breathe out slowly through your mouth.

Source: www.tribuneindia.com/news/health/management-of-chronic-obstructive-pulmonary-disorders-during-pregnancy-336413

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