eli5: why do most, if not all, breathing techniques specify ‘out through the mouth’?

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i can understand in ‘through the nose’, since dust and other bits can be blocked by the nose hairs and mucus, and apparently the air is more likely to warm up when passing through the nose first, reducing irritation of the throat.

but what difference, if any, does exhaling through the mouth make?

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Anonymous 0 Comments

I’m pretty skeptical of nearly every explanation that I’ve heard from this. You hear “Breath in through the nose, out from the mouth” constantly. From everyone from Drama teachers to Athletic coaches to Yoga instructors. None of them, ever, offer a satisfying explanation for why they want us to do this, or what it does. Often there’s some pseudo-scientific statement about that particular form of breathing actually doing something. I don’t buy it.

Except for one: It’s a way of visually demonstrating to the coach that you’re actually focusing on your breathing. It’s the only way they can see that you’re actually thinking about your breath.

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