https://www.healthline.com/health/get-serious-about-severe-asthma/breathing-exercises-severe-asthma?slot_pos=article_2&utm_source=Sailthru%20Email&utm_medium=Email&utm_campaign=generalhealth&utm_content=2022-04-08&apid=36929682&rvid=cded95459555b445d044db2977410c97aa2ce21d0688c96624f02c326c3915c1#1.-Diaphragmatic-breathing
