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Relationship Between Heart Rate And Workload

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Relationship Between Heart Rate And Workload
Describe the relationship between heart rate and workload. Why does the heart respond this way? VO2 max depends on cardiac output, which then both are dependent on stroke volume and heart rate. As demand for ATP in the working muscle increases, the demand for oxygen transportation by the cardiovascular system increases concurrently. While more oxygen needs to be delivered to the working muscle, the cardiovascular system increases both stroke volume and heart rate to deliver a large amount of blood.
Why does the absolute amount of CHO and fat change with increasing exercise intensity? Why does the percent contribution of each substrate change with increasing exercise intensity? The first few minutes of exercise the majority of ATP is produced
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