I've noticed myself doing this myself. I thought it was just because I also have sleep apnea, so what's causing me to stop breathing when I sleep is also happening when I'm waking and engaged on the computer.
Didn't consider that it might be as widespread as the article is suggesting.
I remember reading about this effect of holding your breath during email about a decade or so ago, I started noticing whenever others around me sighed heavily as they closed their laptop or turned to talk to someone. My anecdata agrees that it is an extremely widespread phenomenon and probably takes deliberate training to avoid.
I was thinking about as well. I also have sleep apnea, and I have weird habits of holding my breath throughout the day for reasons I never fully understood. When I got the apnea diagnosis I assumed that that was just further manifestation.
I should probably work on my posture and try breathing exercises.
Didn't consider that it might be as widespread as the article is suggesting.