Target Heart Rate and Cardio Monitoring for Safe Workouts

Maintaining a healthy resting heart rate is a key indicator of cardiovascular health, especially during high-intensity HIIT or IVF. Learn how to lower your heart rate while running and evaluate the accuracy of calories burned on heart rate monitors.

Runner looking at sport watch smartwatch

Why Does Cardiac Output Increase During Exercise?

Your cardiac output is the amount of blood that your heart pumps each minute. The two principal factors that determine your cardiac output includes the number of times your heart beats each minute -- which is your pulse; and the actual volume of blood pumped out with each heartbeat -- which is your stroke volume.

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