Age affects cardiovascular fitness by naturally decreasing maximum heart rate and aerobic capacity as individuals grow older. With age, the heart’s efficiency can decline due to factors such as decreased blood flow and diminished muscle elasticity. Regular aerobic exercise becomes increasingly important for older adults to maintain their cardiovascular health and manage weight. Engaging in activities like walking, swimming, or cycling can help improve heart function and increase overall fitness levels. Consequently, adapting exercise routines to meet changing abilities can enhance cardiovascular fitness throughout the various stages of life.