Ettina wrote:
I can't speak to the psychological health of holding your breath.
Actually I can. If you're some one like me who has sensory overloading and too much activity going on in you brain. Then breath holding can be a good way of training your brain to slow down. After I got my diagnoses of aspergers and learned about the sensory issues. I got back into the sport of free-diving, and that sport requires you to learn to hold you breath for a long time. If you properly train your self to do long breath holds. You get your body used to working under lower oxygen levels. By doing this. You force your brain to shut-down some of it functions and that gives you a more relax feeling. And that alone make the sport of free diving more enjoyable.
Ettina wrote:
One precaution, though - make sure you are in a position where passing out will not cause you to fall. People have sustained life-threatening head injuries from fainting because of the impact of their head hitting the floor as they fell. I would recommend only holding your breath while lying down on a secure surface, such as a bed or the floor.
Actually I use a ski vest and do my breath hold training in the water. I like to be in the water and have the feel of the water around me as I train. And if I pass out. The vest just keep my head above water at all times.