system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does the tounge muscle not grow even if it's constantly moving?

For example, when you workout, your muscles (biceps, pecs, legs, etc.) get bigger by time. Why not the tounge?
gpt
Muscles get as big as they need to be, I.e. if you don’t work out your bicep and just use it for your normal day to day going about your business, it will settle at a certain size, that size will be different person to person.

The cardiac muscles don’t keep growing just because they are beating all the time, they get as big as they need to be to carry out their work then stop growing.

I suppose it is possible, you could set up some sort of resistance training rig for your tongue and strengthen it, it may even grow bigger.