[ELI5] If you get big strong muscles from microtears, then how come we can’t just put something in the body to rip it artificially

Question

[ELI5] If you get big strong muscles from microtears, then how come we can’t just put something in the body to rip it artificially

In: Biology

Answer 1

How would you do it? You’d have to get inside the body something really small to create those tears, and to create many tears you need thousands of whatever you are using.