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The reduction in the rate of systolic ejection following elevation of aortic pressure leads to changes in cardiac output opposite to alteration in peripheral resistance, thus tending to maintain a relatively constant arterial pressure.
Therefore, cardiac output rises during exercise due to increased stroke volume and heart rate. The deference between your resting and active cardiac output is called cardiac reserve. Adaptations to Exercise. Cardiac output adapts throughout a training program. The âAmerican Council on Exerciseâs Personal Trainer Manualâ lists exercise adaptations as increased ventricle size, decreased exercise heart rate and increased stroke volume. Therefore, your heart can maintain a high cardiac output with less effort. Most improvement to cardiac output is contributed to increased stroke volume.