Papa_Bear
Contributor
If you move your arms around a lot during your dive you will burn more of everything!:mooner:
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Look at Calorie Burning
"Caloric expenditure can be measured directly, which requires the measurement of the heat released by the body, or indirectly be measuring ventilation and the exchange of oxygen and carbon dioxide by the body. These methods are termed direct calorimetry and indirect calorimetry, respectively, and the research and validation of these methods date back to the late 1890's (Lusk, 1928). For numerous methodological reasons, the method of indirect calorimetry is the most suitable and accurate to evaluate caloric expenditure during exercise."
It goes on to explain that you need CO2 expiration rates to be accurate, because O2 rate will be different for fat vs. carbohydrate calories, but the difference looks to be about 7%, and so O2 consumption by itself ought to be a pretty good first-order approximation of calories burned.
Now to see if O2 consumption can be reasonably calculated from O2 inhaled ...
Even not feeling cold the body will generally burn calories to keep its core up which you may not even notice.
Don't underestimate the work done on land such as kitting up, carrying gear and so on as well.
I was wondering, along with a lot of other people in our boat today...
Does anyone know how many calories, on average, diving burns? Obviously it varies from diver to diver and per environment but someone had to done some research on this?
Each molecule of sugar that you burn requires oxygen, which comes from your tank, so burning more calories means using air faster, which means you get a shorter dive.