How to pronounce “intercostal muscle” in English

And if I take a breath in and start talking, what you find is, those same intercostal muscles start to move completely differently.And you can hear, if I keep talking without taking another breath, my intercostal muscle start to have to work really, really hard.Because what they're going to do is maintain what's called a constant subglottal pressure at the voice box so I can make sound.