Tom Venuto of Burn The Fat Feed The Muscle has written this great article on the shrinking of fat cells. Here is part one of the article.
Earlier this week someone in our discussion forum wrote, “I haven’t “LOST” any fat… I know EXACTLY where it went! I got a chuckle out of that because I “got” the joke, but truth is, most people really don’t know how fat cells work, how the fat burning process takes place or where the fat goes when it’s burned. It’s actually quite a complex biochemical process, but I’ll explain it as simply as possible, so by the end of this article, you’ll be a “fat burning” expert!
When you “lose” body fat, the fat cell (also called an adipocyte) does not go anywhere or “move into the muscle cell to be burned. The fat cell itself, (unfortunately) stays right where it was – under the skin in your thighs, stomach, hips, arms, etc., and on top of the muscles – which is why you can’t see muscle “definition” when your body fat is high.
How is Fat Stored in the Body?
Fat is stored inside the fat cell in the form of triaglycerol. The fat is not burned right there in the fat cell, it must be liberated from the fat cell through somewhat complex hormonal/enzymatic pathways. When stimulated to do so, the fat cell simply releases its contents (triaglycerol) into the bloodstream as free fatty acids (FFA’s), and they are transported through the blood to the tissues where the energy is needed.
A typical young male adult stores about 60,000 to 100,000 calories of energy in body fat cells. What triggers the release of all these stored fatty acids from the fat cell? Simple: When your body needs energy because you’re consuming fewer calories than you are burning (an energy deficit), then your body releases hormones and enzymes that signal your fat cells to release your fat reserves instead of keeping them in storage.
For stored fat to be liberated from the fat cell, hydrolysis (lipolysis or fat breakdown), splits the molecule of triaglycerol into glycerol and three fatty acids. An important enzyme called hormone sensitive lipase (HSL) is the catalyst for this reaction. The stored fat (energy) gets released into the bloodstream as FFA’s and they are shuttled off to the muscles where the energy is needed. As blood flow increases to the active muscles, more FFA’s are delivered to the muscles that need them.
Enzyme for Fat Burning
An important enzyme called lipoprotein lipase (LPL), then helps the FFA’s get inside the mitochondria of the muscle cell, where the FFA’s can be burned for energy. If you’ve ever taken a biology class, then you’ve probably heard of the mitochondria. This is the “cellular powerhouse” where energy production takes place and this is where the FFA’s go to be burned for energy.
Tom Venuto is a natural bodybuilder, certified strength and conditioning specialist (CSCS) and a certified personal trainer (CPT). Tom is the author of “Burn the Fat, Feed The Muscle,” which teaches you how to get lean without drugs or supplements using methods of the world’s best bodybuilders and fitness models. Learn how to get rid of stubborn fat and increase your metabolism by visiting: www.burnthefat.com