What breath control technique is utilized in the Anti-G straining maneuver?

The Anti-G straining maneuver, commonly used by pilots to counteract the effects of high g-forces, involves holding the breath during periods of increased g-loading. When pilots encounter significant g-forces, their bodies experience increased pressure, which can lead to a loss of consciousness due to insufficient blood flow to the brain. By holding their breath and tightening their abdominal muscles, pilots can maintain their blood pressure and blood flow to crucial organs, especially the brain, helping them remain conscious and in control of their aircraft.

This technique is particularly effective as the pressure created in the thoracic cavity during the breath-holding phase assists in maintaining blood circulation against the forces trying to pull it away from the brain. The breath is typically held from the point just before experiencing the g-forces until the forces pass, rather than employing slow or rapid breathing techniques. Consequently, the focus is on isometric contractions and breath-holding, rather than breathing patterns that would alter the levels of carbon dioxide or oxygen in the blood.