Eli5: Why is how fast your heart rate drops after exercise a sign of how fit someone is


For example how am I fit if I walk up the stairs and my heart rate skyrockets but it goes back down to normal after.

In: Biology

The better shape your heart and lungs are in, the quicker they will be able to restore normal function and get rid of all of the metabolic debt you built up while working out at high intensity. While you were doing that, you were performing a lot of anaerobic respiration, which was producing a lot of toxic byproducts.

it is kind of like how if you have a relatively high income and relatively low bills, should you find yourself going into financial debt for a little while it won’t be as hard to get back on the positive side as it would be for somebody who is making less money and has more bills.