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The human respiratory system, much like the rest of the body, undergoes age-related changes. Did you know that lung function naturally begins to decline after the age of 25, a process that explains the core question of **Why does FEV1 reduce with age?**
Lung function peaks in early adulthood before a natural decline begins, and this includes a measure known as forced expiratory volume in one second (FEV1). Knowing what is the normal rate of FEV1 decline with age is vital for differentiating natural changes from those caused by respiratory diseases like COPD.
Lung function matures in our mid-20s, after which it’s normal for a gradual decline to begin. But what does this mean for a key metric like Forced Expiratory Volume in 1 Second (FEV1), and does FEV1 decline with age?
