Breathing

I had to go to a friend's computer to see the beginning of the show. I couldn't miss Shirley Ballas, even for the one minute.
Then there was the drama of Marie Osmond's fainting. She did say that she forgot how to breathe under stress, and we could hear her hyperventilating. The stress part I can see, but that's why you and I are not on the show. Performers already know how to deal with stress.
Breathing lessons are part of a lot of fitness programs. Pilates and a Network Chiropractor gave me my most recent training to augment the Yoga work I did long ago.
Ballroom Dance teachers usually just remind their students to breathe, but aspiration can aid the lift in the Waltz particularly.