Intentionally replicating the breathing pattern of intense exertion can stimulate the nervous system.

“let's go to the Autobahn and like open it up so with that it's gonna be more of a you know I like wim HOF or you know various different breathing practices throughout history it's like that's a similar thing or that looks a lot like huffing and puffing up the side of a mountain you know so if you don't have a mountain to climb or you don't want to do a bunch of burpees the point of needing to do that you could even start to stimulate your nervous system but by sitting in place and replicating the breathing pattern of um going balls to the wall you know”