Lung elasticity aging describes age-related loss of elastic properties of lung tissue. Structural proteins such as elastin degrade or become crosslinked, reducing lung compliance. Decreased elasticity limits effective ventilation and increases work of breathing. Lung elasticity aging contributes to air trapping, reduced oxygen exchange, and exercise intolerance. These changes also impair cough efficiency and airway clearance. Understanding lung elasticity aging highlights connective tissue integrity as a key factor in respiratory aging.
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