Your muscles don't do this when you see me start the same movement with the aim of tidying.

Just as people don' t use all of their muscle groups at one time, they also don' t use all of their brain at once.

The problem is really not actually the meniscus itself, because I have enough muscles to hold it.

Your biceps will develop quickly with that exercise.

Firstly because running is a single-plane activity - it only uses the body in one direction and uses a limited number of muscle groups at a time.