Daily Dispatch

Know thine enemy in war against fat

This is what you’re up against – now use basic strategy to slim down, says David Prologo

- David Prologo is associate professor in the department of radiology and imaging sciences at Emory University. This article is from The Conversati­on

THIS winter many of us may be considerin­g “burning some fat” so that come the summer, we feel better in our bathing suits out on the beach or at the pool.

But what does that actually mean?

The normal fat cell exists primarily to store energy.

The body will expand the number of fat cells and the size of fat cells to accommodat­e excess energy from high-calorie foods.

It will even go so far as to start depositing fat cells on our muscles, liver and other organs to create space to store all this extra energy from calorie-rich diets – especially when combined with a low-activity lifestyle.

Historical­ly, fat storage worked well for humans.

The energy was stored as small packages of molecules called fatty acids, which were released into the bloodstrea­m for use as fuel by muscles and other organs when there was no food available, or when a predator was chasing us.

Fat storage actually conferred a survival advantage in these situations. Those with a tendency to store fat were able to survive longer periods without food and had extra energy for hostile environmen­ts. But when was the last time you ran from a predator?

In modern times, with an overabunda­nce of food and safe living conditions, many people have accumulate­d an excess storage of fat. [South Africans continue to “supersize”, with two thirds of women and a third of men being overweight or obese, according to the 2017 Demographi­cs and Health Survey.

Child obesity has rocketed with 13% of childathy, becoming overweight or obese – more than double the global average of 5%, Health24 reports.]

The major problem with this excess fat is that the fat cells, called adipocytes, do not function normally.

They store energy at an abnormally high rate and release energy at an abnormally slow rate. What’s more, these extra and enlarged fat cells produce abnormal amounts of different hormones. These hormones increase inflammati­on, slow the metabolism and contribute to disease. This complicate­d pathologic­al process of excess fat and dysfunctio­n is called adiposop- and it makes the treatment of obesity very difficult. When a person begins and maintains a new exercise regimen and limits kilojoules, the body does two things to “burn fat”. First, it uses the energy stored in the fat cells to fuel new activity. Second, it stops putting away so much for storage. The brain signals fat cells to release the energy packages, or fatty acid molecules, to the bloodstrea­m.

The muscles, lungs and heart pick up these fatty acids, break them apart, and use the energy stored in the bonds to execute their activities. The scraps that remain are discarded as part of respiratio­n, in the outgoing carren bon dioxide, or in urine.

This leaves the fat cell empty and renders it useless. The cells actually have a short lifespan so when they die the body absorbs the empty cast and doesn’t replace them.

Over time, the body directly extracts the energy (kilojoules) from food to the organs that need them instead of storing it first.

As a result, the body readjusts by decreasing the number and size of fat cells, which subsequent­ly improves baseline metabolism, decreases inflammati­on, treats disease, and prolongs lives.

If we maintain this situation over time, the body reabsorbs the extra empty fat cells and discards them as waste, leaving us leaner and healthier on multiple levels.

 ?? Picture: GETTY ?? FAT CELL: These are loaded with triglyceri­des, or fatty deposits, and do not resemble other cells in our body
Picture: GETTY FAT CELL: These are loaded with triglyceri­des, or fatty deposits, and do not resemble other cells in our body
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 ?? Graphic: GETTY. SA obesity statistics graphic below: HEALA ?? BUILD UP: Fat tissue is formed by fat cells or adipocytes which synthesise lipids that are stocked in small vacuoles yellow in the cell cytoplasm forming an enormous drop of fat
Graphic: GETTY. SA obesity statistics graphic below: HEALA BUILD UP: Fat tissue is formed by fat cells or adipocytes which synthesise lipids that are stocked in small vacuoles yellow in the cell cytoplasm forming an enormous drop of fat

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