Cardiorespiratory fitness is composed of several key components, including cardiovascular endurance, which refers to the heart and lungs’ ability to supply oxygen during physical activity. Muscular endurance is also part of this component, indicating how well muscles perform over extended periods. Other factors include respiratory function, which ensures efficient breathing, and overall metabolic health, reflecting how well the body utilizes energy. Regular cardiovascular exercises, such as running or swimming, contribute to improving these components, ultimately enhancing overall fitness and health.