Chronic obstructive pulmonary disease (COPD) affects more than 400 million people, continues to be the third cause of death ...

Lung function trajectories for FEV1 and FVC increase rapidly in children until the mid-teens, then peak at age 20 in females and 23 years in males.

Hardcore endurance athletes have tracked the metric for decades, but it is increasingly touted as a measure of fitness and ...