What is the aim of cardiovascular exercise?

The aim of cardiovascular exercise is primarily to improve the efficiency of the heart and lungs. This type of exercise focuses on increasing the heart rate and promoting better oxygen circulation throughout the body, which helps to boost overall cardiovascular health. By engaging in activities such as running, swimming, cycling, or aerobics, an individual can strengthen the heart muscle, enhance lung capacity, and improve the body's ability to utilize oxygen. This, in turn, contributes to better stamina and endurance in both physical activities and daily tasks, making it a crucial component of a well-rounded fitness regimen.

Other options, while related to different aspects of fitness and skills, do not align with the primary focus of cardiovascular exercise. For instance, improving flexibility and balance pertains more to practices like yoga or pilates, whereas muscle strengthening involves resistance training rather than purely cardiovascular activity. Enhancing art skills has no relation to physical fitness and instead focuses on creative and artistic development, further confirming why the correct answer specifically highlights the role of cardiovascular exercises in improving heart and lung function.