I tried breathing as slowly and deeply as I comfortably could, and got 2 minutes 20 seconds for four full breaths without much effort. And I’m not even very athletic. Maybe I should try to keep it up for 10 or 20 minutes to see if there’s any trouble.
You can do 2 minutes 20 seconds for ZERO full breaths reasonably comfortably. :P
You can do 2 minutes 20 seconds for ZERO full breaths reasonably comfortably. :P