Pulmonary function tests are a group of noninvasive breathing tests that measure how much air your lungs can hold, how quickly you can move air in and out and how efficiently your lungs transfer ...

People sometimes say that they are out of breath because they are "poor stamina" or because they are older, heavier, or stressed. But just like the heart, the lungs can start to lose fitness without ...

A lung function test used to help diagnose asthma works better in the morning, becoming less reliable throughout the day, researchers have found. Using real world data from 1,600 patients, available ...