What does "cardiovascular endurance" refer to?

Cardiovascular endurance is fundamentally concerned with the body's ability to sustain prolonged exercise by effectively supplying oxygen to the body. This involves the efficient functioning of both the heart and lungs, which work together to transport oxygen-rich blood to working muscles during physical activity. A well-developed cardiovascular system enhances overall fitness and allows individuals to perform aerobic activities, such as running, cycling, or swimming, for extended periods without excessive fatigue.

While the ability of muscles to perform repeated actions is related to muscular endurance, it does not encompass the cardiovascular system's role. The strength of the heart muscles is more about the heart's structural capabilities rather than its functional endurance. The speed of recovery after exercise is a different aspect of fitness, focusing on how quickly the body can return to its resting state rather than how well it can supply oxygen during prolonged activities. Hence, the correct focus for cardiovascular endurance is on the capacity of the heart and lungs to efficiently provide oxygen during sustained physical exertion.