As a person becomes more aerobically fit,the heart's ability to pump out more blood per beat increases in efficiency.This is referred to as

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Stroke volume is the amount of blood pumped out by the heart with each beat. As a person becomes more aerobically fit, their stroke volume increases, meaning the heart is able to pump out more blood per beat in a more efficient manner. This is due to adaptations that occur in the heart, such as an increased size and strength of the left ventricle, which leads to a larger stroke volume.

As a Person Becomes More Aerobically Fit,the Heart's Ability to Pump