What does stroke volume measure?

Stroke volume measures the amount of blood that is pumped out of the heart with each contraction. This metric is critical for understanding cardiovascular efficiency and health, as it directly relates to how effectively the heart can supply oxygenated blood to the body during physical activity and at rest. A higher stroke volume often indicates a stronger heart that does not need to beat as frequently to maintain adequate circulation, while a lower stroke volume may suggest potential cardiac issues or lower exercise fitness levels.

In the context of exercise, stroke volume is a vital component in calculating cardiac output, which is the total volume of blood the heart pumps per minute. This understanding is crucial for athletes and coaches who monitor cardiovascular fitness and performance.