Andrew Huberman· PhD
gear three and four is like a subtle Extinction I actually don't even care about the difference there I basically use gear one two and then S4 but you're basically talking about either a nose to mouth strategy or a straight up mouth mouth right so breathing in through the nose out through the mouth if you can control it that way you can do the opposite actually right can you breathe in and out through your nose but the classic one people do is in through the nose out there the mouth um again I really don't even care about distinction I basically jump from two to four a Brian may do it differently I don't actually know um four is just mouthmouth right