A breathing protocol involves inhaling deeply through the nose, passively exhaling, repeating for one minute, pausing for one minute, and repeating for 2-3 rounds.

“There's a pattern of breathing that we all do in sleep. When our carbon dioxide levels in our bloodstream get too high. And we do this when we get claustrophobic, meaning we do it reflexively. And that's a double inhale through the nose followed by a long exhale.”