science of how your body burns fat

Energy Production: Science of How Your Body Burns Fat

dkling Uncategorized 0 Comments

So you’ve been working out.. you’ve lost a few pounds (ya you ;))… have you ever wondered how you did it– or where that fat went? I’ve got you ft. science

How Does Your Body Burn Fat?

Your fat tissues are made up of Lipids (hydrogen, carbon & oxygen). The hydrogen, carbon and oxygen hold energy in its bonds. When the molecule is broken apart, they release the energy stored. This is the process of burning fat.

Where Does the Fat Go?

According to a study done at The University of New South Whales, after the lipids (fat tissue) are broken down and changed into energy, you literally exhale the byproduct.

They found that for every 10kg of fat that you burn, you must inhale 29kg of oxygen to metabolize the fat and release it’s energy.

In return, that process produces 28kg of carbon dioxide & 11 kg of water … then you exhale, sweat it out/ pee out the molecules (the “broken down fat”).

Where Do My Muscles Get Energy From?

ATP: (Adenosine, Tri-Phosphate) Only form of energy you body can use is in the form of this molecule  (think of it like car, ATP is like gas)

How Do we Create ATP?

By Aerobic & Anaerobic Synthesis:

Aerobic: When oxygen and nutrients are present

Anaerobic: Chemical reactions when there is no oxygen present


What is the Best Source of Fuel for My Workout/ Burn Fat?

Well, depends on what kind of workout you are doing:

  • Glucose (comes from Carbohydrates): used by muscles during low intensity exercises
  • Glycogen (comes from Carbohydrates): used by the muscles during high intensity exercises
  • Free fatty acids (comes from Fat): mostly used by muscles during rest & low intensity exercises

*Glucose and glycogen are twice as fast at burning fat than fatty acids

Why Do I Get Sore When I Workout/ How Do I Minimize This?

Heat & lactic acid are the byproducts of glycolosis (the breaking down of glucose used to make ADP (aka your energy source)). Lactic acid can build up in the body and cause you to feel achy and sore. You can reduce this by warming up and stretching.



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