Many popular diets, from Dukan to Lemme , are all based on the same principle for weight loss: eliminate carbohydrates.

This weight loss thing basically works for two reasons: on the one hand, by eliminating carbohydrates, you also eliminate all sweets, fruit, baked goods (biscuits, crackers), bread, pasta, potatoes and rice, which often we eat a lot more than we would like to admit. The second reason concerns proteins: more satiating in general than carbohydrates, they mean that you can never really eat too many of them.

There is also a third reason why the needle of the balance drops more easily if we eliminate carbohydrates: diets without carbohydrates cause you to lose a lot of fluids, this is because carbohydrates make us retain more water, and also because a part of the lean mass as it loses its initial glycogen stores, it also releases water.
Later the body learns to preserve muscle reserves starting from the nutrients it receives: this is why the water loss of low carb diets is above all initial.
Now, a distinction must be made between what it means to eliminate carbohydrates for a person who does not train and what it means to do a low carb for a person who follows a physical activity routine.

In “commercial” diets, eliminating carbohydrates is equivalent to not eating more or almost for the entire duration of the diet. In sport, on the other hand, the carbohydrate-free diet is usually cycled, that is, it is alternated with moments in which high quantities of carbohydrates are eaten: this not only in order not to affect lean mass, but also to not reduce sports performance (which in the end leads to a progressive decrease in strength and therefore also to a decrease in lean mass).

Beyond the three reasons I have explained to you, eliminating carbohydrates without cycling them, then cutting carbohydrates full stop in hopes of losing weight, not only does it not work, not only is it deleterious in the long run, but it is counterproductive.
If you don’t want to GET BACK weight with interest, don’t eliminate carbohydrates from your diet. 
Don’t do it. Don’t listen to your friend, your neighbor, your child’s teacher, your gym partner, or TV.

Now I’ll explain why not to do it, referring to those diets in which the alternation or cycling of carbohydrates is not foreseen, therefore to the diets that you find in the magazines, if continued for more than one or two weeks.