Breath control

Using the Force power breath control, a Force Sensitive could suppress the body's instinct to shut itself down after long periods without oxygen, allowing the user to be able to go without breathing for longer periods than they would ordinarily be able to, by using the Force to reserve the amounts of air in their lungs. It was believed that some practitioners of the ability could hold their breath for hours or even days by using the technique. This ability used independently, however, would not prevent anything entering or leaving the respiratory system of the user. In some cases, the user would require some kind of Force barrier in, or around the nose/throat region to keep poisonous gases or water out. The necessity of such a barrier would depend on the air/water pressure in the direct vicinity, and the user's ability to naturally seal their airways. This ability proved to be very effective in situations where the air was very thin, underwater, or in any environment with toxic fumes.

Text and facts from the “Breath control” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.