Why does heart rate change faster than respiration rate when you are exercising?

the heart is smaller than the lungs, its like using little wheels on a car compared to big wheels, the little wheels have to go at a higher angular velocity to achieve the same linear speed as the big wheels.

This is not an ideal analogy, since the function of the heart and lungs differ. The heart is just a pump, the lungs are for gas exchange. Both deal with the same fluid, but the goals are different. Respiration is controlled by CO2 and O2 levels, whereas the heart rate is controlled mainly by how much blood is returning to it. It pumps what it gets, if it gets alot, it pumps alot.

You would expect that a increased demand on the heart to pump more blood might translate for a higher demand for gas exchange at the lungs, but the body is only going to do what it needs to do.

Why does heart rate change faster than respiration rate when you are exercising?

Because during aerobic exercise(with Oxygen), you are using the oxygen in your blood and so your heart has to pump more blood faster to support the oxygen you are using during exercise. And the more intense your exercise, the harder and faster your heart has to pump your blood.

Why does heart rate change faster than respiration rate when you are exercising?

Do u mean cellular respiration rates or breathing rates?

Cellular respiration rates should increase in order to release energy to continue the activities (eg. muscular contraction). In order to provide the oxygen and glucose respiring cells require, the heart hence pumps faster to bring more oxygen and glucose for the cells. So actually, the cells respire at a faster rate FIRST before the heart cooperates with them and pumps faster. So the change in heart rate shouldn%26#039;t be faster than change in cellular respr rate.

Of course, you can consider anaerobic respiration, however that will still require glucose.