[teeray]

Fighter pilots are trained to contract their solar plexus by making a “hut” sound to do something similar when they’re passing out. I was going to try this the last time I was fainting after a blood draw, but was interrupted by the phlebotomist imploring me to breathe slow and deep—I think this just sunk me further into it.

[lukas099]

Valsalva maneuver against a closed glottis. As someone prone to blacking out when standing up or after a set of heavy squats, figuring this out has been very useful to me.