James Nestor

You see a bear out there that's just like, oh, I have seasonal allergies and asthma.

I can't get up today.

Oh, yeah.

We take far fewer, and that's good, because we're taking fewer, but we're taking deeper breaths.

Most of us are over-breathing, which is a really bad habit, because you offload this gas called carbon dioxide, which causes this vasoconstriction, which causes blood flow problems.

So by taking fewer, richer, deeper breaths, we're able to get more oxygen, more energy for less effort.

And that's exactly what we want.

And our noses are also our first line of defense.

So you've got nose hair, right?

Most people do.

And there's also all of these other pathways that air has to follow through as it makes it into our lungs.

Those are there for a reason.

They help filter out bacteria, viruses, pollutants, dust, and everything else.

So when we're breathing through the mouth...

all the crap in the air is going directly to my lungs, which causes inflammation and which causes congestion, right?

It causes other issues.

Yeah, this is something I didn't really pay attention to when I was doing the first edition of the book, which is something I learned a lot about during that time and wanted to put in a bunch of new pages about the science that I discovered.

So I heard this about three, four years ago, that in indoor environments, carbon dioxide levels are through the roof.

We always hear about outdoor environments, CO2 is going up every year, which is true.

It's like 422 parts per million outside.