When you breathe in, your heart is compressed and in response it beats faster.

When you breathe out, your heart is under no pressure and in response it beats slower.

If you are nervous, it's because you are breathing in too much.

If you are lethargic, it is because you are breathing out too much.

The most powerful way to bring balance back is the physiological sigh, a sharp in breath, and then stretch a little more and pull hard, and then let your whole upper body just deflate, and let the air pressure naturally push out your exhale.

If you do it 5-10 times over a couple of minutes, every day, it has more benefit than an hour of meditation, on overall making you feel more calm and cool headed.

This helps everything else in so many ways it needs to be the baseline staple knowledge of all humans: how to breathe. About half of our illness is from breating wrong.

Letting conditioned reactions regulate our breathing behaviour also, and this is also weakened as we learn to take control of it.