The title isnīt the best, but anyway...

What are the common things that you can do in a lucid dream that your body will do too at the same time?

I mean, once in a lucid dream I wondered, do I breathe the "dream air", or better said the "hallucination air", OR does the feeling of breathing come from my body. So can I control the breathing of my real body when in a lucid?

I also noticed that screaming can make my body scream.

So, as said, what are the common things that you can do to make your body do it too?