Lamaze breathing for pain management and survival
Renner learned Lamaze breathing at age 12 when his mother was pregnant, as a way to help her manage labor pain. He never imagined it would save his life decades later. When the snowplow crushed him, his rib cage collapsed on his lung, making every breath a struggle. He instinctively used the short, sharp breaths he had learned, focusing entirely on the next exhalation. He describes the effort as equivalent to doing a one-arm push-up with each breath. The technique kept him conscious and prevented him from passing out, which would have been fatal given the remote location and the time it took for help to arrive. He also used mental focus to 'zoom out' and stay calm, checking his body parts systematically and prioritizing breathing over everything else. This protocol, he says, was the single most critical factor in his survival.
The forced exhalation helps expel air to make room for inhalation, and the rhythmic breathing pattern can distract from pain and panic.
Renner used this technique when he was crushed by the snowplow, unable to breathe, and it kept him conscious for 45 minutes.
I had to like work and it's like doing like a one-arm push-up. It took every piece of physical energy I could do just to exhale a little bit so I can get a little bit more back in.

