https://pattykikos.com/prana-and-apana-the-air-coming-in-vs-the-air-moving-out/The exhalation is moved by an energy known as apana. The apana wind is a force for expelling from the body, usually taking the form of a downward contracting movement. Its home is the pelvic floor, so the impulse to exhale originates from a point at the center of the pelvic floor.
The inhalation is moved by the energy of prana vayu in the opposite direction. Although the inhalation draws the breath down into the body, the energy of the inhalation is at the same time experienced as rising within and spreading like the opening of a lotus flower.
