Well why haven't you trained in Hapkido?
Sorry, got you confused with someone else. But what is your art and how do you do breathing exercises?
Haha good point! I think up in Melbourne there's Hapkido which is an hour away, if I find nothing else I'll look into it

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The art I'm studied and am now moving on from is Kyokushin karate. Overall there wasn't too great a deal an emphasis on certain breathing, but we did at times focus on it exclusively.
On the left of the page you'll see a section I wrote on ibuki breathing which we did a fair bit of. It's a tension-based breathing, in which you do a short, sharp inhale, then you close the throat over as small as possible, and force the breath out that small gap as forcefully as you can whilst tensing the abdomen and whole body in general. I believe it's a method of training the body to be strong, and to help sync your body, mind and breath. Also teaching how to absorb a blow. But it can't come just from the throat, but from deep down and takes aLOT of practice... I can see the benefit of it, but I think doing it too much would be harmful... It's done in Sanchin kata in a lot of karate styles.
We also did Nogare breathing (Nogare sono Ichi, Ni and San), which was softer, and designed to slow your breathing and heart rate down, we did it especially after an really intense session.
The page on the right was just notes I took down from a video I watched which talked about breathing, not doing it shallow, nice and deep on the inhale and exhale.
More on ibuki breathing in Kyokushin:
What is Ibuki and Nogare? | The Martial Way