Many people, find the excuse not to exercise because as they say , when you stop working out muscles will turn to fat and as a result their bodies will be worse than before starting the exercise.This is impossible, since muscle and fat are two completely different tissues and cell groups.
So as the sun can not erupted from the west, unless a miracle happens, so the muscles can not be converted into fat. The same goes for fat, since a lot of people have the idea that it can be converted into muscle . This is impossible !
What happens to most people that stop gymnastics, is that their muscles shrink due to atrophy. In other words, muscles are fed with fewer elements of amino acids, so they get smaller.
If we consider that very few of these people will adapt their diet to the new realities of life, that is without exercise, we conclude that there is significant excess energy ( carbohydrates ) which will be converted into fat.
Thus, a man who did not know them and noticed a former athlete to fatten , then you assume that muscles turned into fat.
It is obvious that the conversion of muscle to fat is still a myth of fitness & bodybuilding.