When you are saying about holding your breath, what is

When you are saying about holding your breath, what is tjhe translate od the phrase: You get your breath back

get your breath back = resume normal breathing / get back to normal breathing

First of all, the transcript for this audio is not exactly accurate. What they’re actually saying is:

ROB: OK, well, why don’t you get your breath back now.

FINN: Good, yes, good idea.

Rob is just suggesting that Finn take a minute to resume normal breathing after Finn had been holding his breath.

different ways of saying the same thing:
How about you take a minute to get your breath back?
Why don’t you take a minute to get your breathing back to normal?