What Happens In My Body When I Lose Weight ?
Your scale is adamant: you have lost weight! Good news for many of us… But what is behind this “weight loss”? Not just fat loss, that’s for sure!
Water losses
Our body is made up of more than 60% water… When we lose weight, we inevitably lose water . This will be mainly eliminated from our body through urine, but also through perspiration. Sweat thus remains 99% water!
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Fat loss
Rest assured, “losing weight” also means “losing fat” … This fat is stored in cells called “ adipocytes “ or “fat cells”. Together, they form adipose tissue. The loss of fat mass results from the oxidation of these cells … Losing weight does not reduce the number of cells present in adipose tissue … but reduces their volume! So, no matter how many pounds you lose, the number of cells will stay the same… They’ll just be smaller! “In the event of weight gain, the adipocytes will initially gain volume, reaching up to 40 to 50% of their initial volume. A mechanism that remains reversible. Only, in a second step, these cells can be brought to multiply… And there, even with a significant loss of weight, it remains irreversible: the number of cells which make up your adipose tissue will not be able to decrease any more! “, specifies Doctor Arnaud Cocaul, nutritionist doctor. Also, the more cells that make up your adipose tissue, the greater the risk of regaining weight! So beware of significant variations in weight: they disrupt and harm your adipose tissue, in particular by multiplying the number of cells that compose it …
Loss of toxins
Losing weight also allows you to get rid of many toxins … Whether they come from the environment or the diet, many toxins are indeed stored in fat cells. “ During weight loss, these toxins will be released into the bloodstream and then eliminated from the body through the liver or kidneys, ” explains Dr. Cocaul.
Muscle losses
“Losing weight” inevitably means “losing muscle”. A rather negative point this time … Because muscle mass turns out to be a precious ally, especially in maintaining our healthy weight over the long term: it has the ability to increase the resting metabolism (or basal metabolism) which represents on average 60 to 70% of total expenses! Result: we burn more calories at rest … “Loss of muscle mass” thus remains synonymous with “reduced resting metabolism” … And that can cost us dearly!
Beware: the loss of muscle mass remains amplified by overly restrictive diets which do not act on both intake and expenditure!
Did you know ? Men have a higher basal metabolic rate than women … They burn more energy while at rest. The reason ? Their body composition: they have more lean mass (muscles) and less fat mass (fat) than women!
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Restrictive diets: watch out for hormonal variations!
Are you hungry and can’t get the idea out of your head? Restrictive diets can indeed panic your hormones directly involved in the hunger mechanism. “ These hormonal variations occur extremely quickly after a too restrictive diet … Two hormones are mainly concerned: ghrelin and leptin. The first is a hormone which stimulates the appetite: it is mainly produced by the stomach when the latter is” empty “. The second is secreted directly by fat cells: it promotes satiety and boosts our metabolism “, underlines Dr Cocaul. These two hormones are in constant contact with our brain, telling it to eat… or not!
Several studies have shown that overly restrictive diets (which include significant calorie restrictions and avoidance of certain food families) lead to an increase in the level of ghrelin (the hormone that stimulates the appetite) and a decrease in the level of leptin (the satietogenic hormone). These diets thus remain inevitably associated with a high failure rate since they push us to eat more … Result: Ultimately, we regain the pounds lost, or even more… This is the famous “ weight yoyo “!
Experts have highlighted the deleterious effects on health of overly restrictive diets and sudden and drastic weight loss. “ The rate of reasonable weight loss is of the order of 2 kilos per month, or 500 grams per week “, underlines Dr Cocaul, nutritionist doctor. Moderate weight loss (of the order of 5 to 10% of the starting weight) remains particularly associated with an improvement in blood parameters (such as blood sugar or triglycerides ) as well as a decrease in blood pressure …
If you want to lose weight, know that the best option is to be accompanied by a health professional.
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