Which component of fitness is directly related to heart health?

The component of fitness that is directly related to heart health is cardiovascular endurance. This refers to the ability of the heart, lungs, and blood vessels to supply oxygen to the working muscles during sustained physical activity. Good cardiovascular endurance means that your heart is efficient in pumping blood and delivering oxygen throughout your body, which contributes to overall heart health. Engaging in activities that improve cardiovascular endurance, such as running, swimming, or cycling, helps strengthen the heart muscle, improve circulation, and lower the risk of heart disease.

In contrast, flexibility involves the range of motion in joints and does not specifically address heart function. Muscular strength relates to the amount of force a muscle can produce and is more focused on the muscles rather than cardiovascular health. Body composition refers to the ratio of fat to lean mass in the body and, while important for overall health, it does not directly measure how well the heart performs its function in supplying blood and oxygen during exercise.