Probably something to do with shallow breathing so you inhale and exhale more often the one should without maximizing oxygen intake per breathe nor efficiently regulating oxygen/co2.
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.
"We breathe how we feel we need to breathe". The key word is feel. Change your breathe change the way you feel
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.