How Fat Evaporates?
It may seem surprising to talk about pounds lost at this time of year-end celebrations, synonyms for many of us to larger meals than usual, desserts shaped log and distributing sweets. But here is the period chosen by the British Medical Journal to publish the results of the work of Ruben Meerman (who himself lost 10 kilos) and Andrew Brown. These Australian scientists have to make – at last – an answer to a question that may seem trivial: what is the fat that “bottom” during a diet?
“Spontaneously, I would say that fat is converted into energy because when we make a plan, there is a lack of calories, we must take the energy somewhere and it draws from the fat,” said Dr. Jean -Michel Borys, endocrinologist and nutritionist in Paris, when asked about it. Like him, more than half of the 175 doctors, dieticians and other health professionals interviewed by the authors estimated that fat was then converted into energy or heat. A response that does not meet Ruben Meerman, a physicist by training, since it violates the law of conservation of mass (the latter to remain the same even if the chemical transformation of an element).
Scientists have tracked so every lost lipid molecule to determine its future. They recall, in their article, that weight loss is a consequence of the release of carbon, hydrogen and oxygen contained in the fat cells. Result: 10 pounds of fat removed during a diet, 8.4 kg volatilize carbon dioxide (CO2) and thus are evacuated through the lungs. The remaining 1.6 kg is converted into water and then eliminated through urine, sweat, tears and other body fluids.
So, should we breathe (eg playing sports) to melt the unnecessary fat? The authors note that “to lose 10 pounds of fat, you will first have breathed 29 pounds of oxygen.” “Physical activity helps to flush fat from muscle,” says Dr. Borys. “Work has clearly shown that the infiltration of muscles triglycerides was originally insulin resistance, obesity and type 2 diabetes, but be aware that the main expense, by far, n is not related to physical activity, but the basic metabolism of the body, including breathing, heart beat, maintaining the temperature … ”
Unfortunately, there is a genetic determinism in this area, burning some great, some not. And to try to compensate for (some) departure inequality, there is no alternative but to ensure its energy balance. To lose weight, it must be negative. So the ideal is to act both on inputs (what we eat) and expenditure. Australian authors recall that daily exercise time to delete an overload of 40 grams of carbon. So it is better never forget that everything that was not taken will not be lost. Even during winter break, alas …