abdominal breath in a sentence

1. When lifting the lower spine, the abdominal area is extended as you breathe in with the abdominal breath.
2. Diane Nichols, a psychotherapist who calms a stage-fright class in Juilliard's evening division, suggests steps for the moments before performance, if circumstances allow : " Take two deep abdominal breaths, open up your shoulders, then smile, " she said.
3. It's difficult to find abdominal breath in a sentence.