An article about the benefits of singing for COPD as well as asthma
theepochtimes.com/health/si...
an exceprt: ... According to Youssouf, singing naturally mimics pursed-lip breathing, a technique often recommended to COPD patients. This form of breathing helps keep the airways open longer, which reduces air trapping and facilitates the exchange of oxygen and carbon dioxide. Singing also aids people in developing better breathing patterns that are especially beneficial during episodes of shortness of breath...