One of the most recurring phrases in the world of nutrition is this: ” eat less and move more “, from the English “eat less and exercise more”, a phrase that implies the idea that if I reduce calories and burn more energy, I will lose weight for strength, according to the principles of thermodynamics and a simple inverse mathematical calculation, so if it is true that a kilo of body weight corresponds to about 7200 calories, if I save 500 calories a day between food and exercise, I should certainly lose half a kilo a week .
The biggest supporters of this way of thinking are not only nutritionists, but also personal trainers. On the internet it is full of phrases in which people are urged to do more and more, for example “the abdominals are done in the kitchen” (or you have to lose weight if you want to see your abs), or “no pain no gain”, a concept that in Italian was once expressed in this way: “if you want to look a little ‘you have to suffer ”.
Unfortunately, however, things are not exactly like this. Our body is a complex machine, and this machine, while responding to the laws of thermodynamics, cannot be represented only by them : when we try to lose weight, in fact, a series of mechanisms come into play to prevent a number of calories lost from corresponding to a precise and possible weight loss.

I’ll explain.
If it were true that a human being by eating 3,500 fewer calories (I eat fewer or burn them more) lost half a kilo, this thing should, to be scientific and reliable, occur with any human being, and in any condition : d ‘ summer, winter, in ten days, in forty, north, south, etc., and regardless of the conditions of the human being (fat, thin, man, woman, etc.).