Muscle doesn't turn into fat

6 January 2025
Adarsh Gopal

There is no simple way to say this.

But muscle is a hard earned bit of personal property and it is even harder to keep it than it is to gain it in the first place.

And unlike energy that can transform from one form to another, muscle cannot simply be converted to fat. When you lose it, muscles are gradually broken down by the body into amino acids that are then used as energy or to make new tissue such as enzymes, hormones, hair, nails and other parts of the body that require amino acids.

You lose muscle with disuse. Disuse means you don’t produce enough force with a muscle. Muscles have one reason to exist. To produce force and, if required, hold a position.

People who claim that muscle turns into fat when they stopped working out belong to two categories:

They consumed far too much energy once they stopped training. They gained a lot of body fat. Their body composition got much worse.
Once they stopped training, they lost the muscle they had gained through training. Even without eating much more, their body composition became worse as their body fat levels crept up as they lost muscle.

In both cases, the fault lies in inactivity and very high levels of energy intake relative to the individual requirement.

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