Vocal science from 1980s still true now: at 15:00, Serious violent physical action like trying to lift piano, we have to grunt like "Huh!" cuz need to close the vocal folds, to stabilize the breath pressure in lungs, which gives shoulder & back muscles a firm base to work against. Laryngectomy means no vocal fold closure, & u have to retrain other muscles to take over that function. https://www.youtube.com/watch?v=8VpgvqN-53o

@qoph Is this also a physiological basis for the kiai and similar vocalizations from various Asian martial arts?

@starbreaker From my martial arts geek cousin: "I’m sure they are one of the same." But then he says, "The habit of exhale of the lungs (with or without a sound) does seem to create a more powerful strike" -- but exhaling without a sound is different from closed vocal folds stabilizing lung pressure & thus providing a point of leverage for shoulder & back muscles.

But then, "When I train on the heavy bag, the last set I go bananas/ape on the bag & yes the sounds become more violent & louder."