Which of the following is NOT a component of cardiovascular fitness?

Cardiovascular fitness primarily revolves around the efficiency of the heart, lungs, and the body's ability to utilize oxygen during sustained physical activity. It is a vital component of overall physical fitness, often assessed through activities that elevate the heart rate, such as running, cycling, or swimming.

Agility, while important for overall athletic performance and involves the ability to move quickly and change directions, is not a direct component of cardiovascular fitness. Instead, it relates more to coordination, speed, and balance, which can be important in various sports but do not specifically enhance the cardiovascular system.

On the other hand, flexibility, muscular strength, and body composition are considered components of physical fitness in a broader sense. Flexibility can support cardiovascular workouts by ensuring that muscles and joints function well during movement. Muscular strength contributes to overall fitness and can indirectly support cardiovascular health through activities that engage multiple muscle groups. Body composition relates to health indicators that can be affected by the level of cardiovascular fitness as well.

Therefore, agility stands out from the other options as it does not focus on the cardiovascular system itself, highlighting why it is the correct answer to identify what is NOT a component of cardiovascular fitness.