[martindbp]

But how could we be "conditioned" to breath in a certain way? It reads like a conspiracy to me but maybe that's not what they meant?

To me, breathing is a highly personal thing, I doubt there is any outside force able to change how we breathe for the worse. I just don't see the attack vector. We breathe how we feel we need to breathe.

[wolco]

The idea is to control breathe for different affects.

"We breathe how we feel we need to breathe". The key word is feel. Change your breathe change the way you feel

[Barrin92]

>But how could we be "conditioned" to breath in a certain way?

bad posture, overweight, too little exercise, too much stress. Not much of a stretch to think that the behaviour that gives countless of people snoring, backpain, or high BP may also negatively effect how we breathe.

[vl]

Same way as you can walk or run in a harmful way, it maybe that the way you are breathing is sub-optimal.