What are the common body dynamics in most martial arts?

I'm not sure what you are specifically looking for.

Because the human body is a pretty standard item, it has specific types of movements and the joints and muscles work the same way for everyone. Knowing how a Boyd moves means that you know how to block it and how to leverage these to cause pain or damage.

A straight punch or kick, basic blocks and movements are fairly consistent across the martial arts. Even many of the joint locks are seen across the board.