OK well, the first thing you got to do is make sure you haven’t recently tried to do this underwater as this may take some air and energy out of you. You need to be at maximum stamina for this. Now if you are wearing goggles make sure you keep it partially open before you plunge in the water so you get as much air possible for your nose. Now take a deep breath and dive into the water.

THIS IS THE IMPORTANT PART: Do not flop about in the water!!! This takes a lot of health and air out of you!!! Keep as STILL as possible and face your head directly BELOW you. That way the air won’t escape from you but some of the air bubbles might come back to you. Make sure you stay in as long as possible before you go up as you are trying to do your best.