Muscle Turns Into Fat When You Stop Exercising

Muscle and fat are completely different tissues, and one cannot transform into the other, any more than a bone could turn into a kidney. When you stop exercising, two separate things happen that together create the illusion. Your muscles, no longer being used, shrink through a process called atrophy, so you lose size and tone. At the same time, if you keep eating as if you are still training but burn fewer calories, you store the surplus as fat. So the muscle shrinks and the fat grows, side by side, and the overall softer look gets blamed on a conversion that never happened. The same logic explains the reverse: exercise builds muscle and, with the right diet, burns fat, but it does not turn one into the other. They are independent. So 'use it or it turns to fat' is two true things welded into one false one. The muscle just leaves, and the fat just arrives.