Speaking of Huberman, I've had great use of the physiological sigh[1] for dealing with stress.
Culture gripe; I wish more creators got to the meat first, and added the long drawn out explanations later. I know why they don't (views == $$), but for real. I don't need your life story, just tell me how many onions I need to buy for the recipe.
Note: this doesn't mean the technique takes a few seconds, just that the technique will be useful in seconds
No, in the current Youtube ecosystem it's "watchtime == $$". Maybe you meant that anyway, because it matches your actual comment way better.
Incredibly skeptical that it could work, but repeating it 5-10 times in a row significantly calms me and fills me with a warm relaxed feeling for at least 10-15 minutes.
From what I've noticed, more than two inhales is fine, it still works. It just shouldn't be an uncomfortable amount of air in the lungs.
I've also noticed that my dog does this when he's about to go to sleep.