You will find 71 interesting pages which worth of reading.
Please take a stop at page 20 and discuss the nostrils vs mouth breathing.
Is it better to breath with nostrils mouth closed before dive (the 3-5 mins of relaxation/breaths between dives) or not....??
I personally feel that I can fill my lungs better with mouth breath instead of nose.
So? better take off the mask and breath through nose supinely position, relax, put mask on again, take three deep breaths from mouth and dive??
Please take a stop at page 20 and discuss the nostrils vs mouth breathing.
Is it better to breath with nostrils mouth closed before dive (the 3-5 mins of relaxation/breaths between dives) or not....??
I personally feel that I can fill my lungs better with mouth breath instead of nose.
So? better take off the mask and breath through nose supinely position, relax, put mask on again, take three deep breaths from mouth and dive??