It’s actually called Pursed lip [breathing](https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.medicalnewstoday.com/articles/325555%23:~:text%3DPursed%2520lip%2520breathing%2520is%2520a,out%2520slowly%2520through%2520the%2520mouth.&ved=2ahUKEwibw6y-rtnpAhWBJ80KHWHvD3cQFjAEegQIKRAM&usg=AOvVaw3HeAWW9lX2PT4NttKHCQMN)
Pursed lip breathing is a simple technique for slowing down a person’s breathing and getting more air into their lungs. With regular practice, it can help strengthen the lungs and make them work more efficiently. The technique involves breathing in through the nose and breathing out slowly through the mouth.
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