Breathe — Brain Cooler

the mechanism

Box breathing & vagal tone

Four seconds in, four hold, four out, four hold. Slow structured breathing activates the parasympathetic nervous system through the vagus nerve: heart rate drops, cortisol drops, and vagal tone, your capacity to calm yourself, rises.¹

Eight cycles take about two and a half minutes, enough to shift your autonomic state from alert-stressed toward calm-focused. The field around you is a living reaction-diffusion simulation, growing all the way across the screen. It only dissolves where you are looking, so the pace stays the one thing in focus.

Zaccaro et al., How breath-control can change your life, Frontiers in Human Neuroscience, 2018. Systematic review.