Cardiovascular fitness refers to the efficiency of the heart, lungs, and blood vessels in transporting oxygen to working muscles during physical activity. This aspect of fitness is crucial for overall health, as it supports endurance and reduces the risk of chronic diseases like heart disease and diabetes. Improved cardiovascular fitness enhances stamina, enabling individuals to perform daily activities and exercise with greater ease. Regular aerobic exercise, such as running, swimming, or cycling, is key to enhancing cardiovascular fitness and promoting better health.