Molchanov beneath the surface before the dive.

He focused on taking long, deep, rhythmic breaths until his heart rate slowed and he entered a meditative state. Then he sipped the air through pursed lips until his lungs were fully inflated, from his diaphragm to the tiny air pockets between and behind his shoulder blades. Finally, he ducked below the surface, and disappeared.

Source: www.nytimes.com/2021/03/24/sports/freediving-alexey-molchanov.html

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#pursedlipbreathing