How do humans estimate how many calories are burned through a certain type of workout? ie : it is estimated that you burn 200-600 calories walking for an hour, depending on body weight.

Question

How do humans estimate how many calories are burned through a certain type of workout? ie : it is estimated that you burn 200-600 calories walking for an hour, depending on body weight.

In: Biology

Answer 1

For every sugar molecule you burn for energy, you give off a certain number of carbon dioxide molecules.

Measuring carbon dioxide output while exercising can provide a pretty good estimate of sugar and therefore for calories burned..