What happens to the lungs as we age?

Unfortunately, as we age, structural changes occur in the lungs and other components of the respiratory system: They lose some of their elasticity, the chest wall stiffens, the alveoli's surface area decreases, and your respiratory muscles weaken. The result: a measurable decrease in airflow. Add on the fact that lung problems like asthma or bronchitis can restrict airflow by making the bronchial passages functionally narrower, and you can soon find yourself with more breathing problems.