Ujjayi pranayama, also known as ocean breathing, is a slow, deep breathing technique that activates the parasympathetic nervous system. It involves constricting the back of the throat on both the inhale and exhale to make a soft hissing sound. Ujjayi breathing concentrates the breath, increases oxygen consumption, expands the lungs, calms the mind, and can be beneficial for processing grief. The instructions detail how to apply the throat constriction to breathe through both the mouth and nose to produce the ocean-like sound of ujjayi pranayama.