How to get meat on your arms

Originally Posted by Killy

But you can grow new fibres, although that growth is - as I have already said - minimal in comparison to the overall increase in volume. Bottom line is, it is possible to add mass to the fibres, but you're not going to grow a bundle of fibres out of nowhere, that's for sure.

Also, if you were unable to grow new fibres, how do you expect damaged tissue to repair itself? For instance when a muscle snaps in half, it needs to grow new fibres and repair the damaged ones.

Each muscle comes with a certain number of fibers. This number can never be increased. The fibers can repair themselves, and they can grow bigger, but you can never grow more of them, just like you can't grow more neurons.

Jam it back in, in the dark.