You need to breathe in a relaxed way.Thanks everyone. Will be taking it with SDI. during water treading, do we hold breath, or just breath as usual?
If you are positively buoyant I suggest you learn to just float on your back for example.
If you less buoyant than the average guy (that was my case), you can ask if you can swim it ? I think I just did the same movement than a breaststroke with the upper body to get my head out of water when I needed to breathe.