I was reading about the differences between mouth and nose breathing, and it seems that nitric oxide is beneficial to cardiovascular health, but that only breathing through one’s nose produces it. I couldn’t seem to find a simple explanation for it.
Edit to add: I thought this was a genuine question about something I didn’t understand but wanted to. So much(passive) aggression in the comments. Apologies. I was just trying to learn.
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Looks like this been answered but you can increase the production of NO 20x by humming.
https://pubmed.ncbi.nlm.nih.gov/16406689/
If you take 5 mins of your day and do this, it’s meditative and you really feel a difference in your body. I usually do 5 deep breathes exhaling from my mouth to get rid of excess co2 and oxygenate my blood. Then I do deep inhales through my nose, with slow controlled hums out until you empty your lungs.
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