The Mammalian Dive Reflex is an automatic physiological response triggered when the face is immersed in cold water. It optimizes oxygen use and redirects blood flow. The vagus nerve mediates the heart-rate-slowing component of this reflex.
Key Effects
- •Bradycardia — heart rate slows immediately
- •Peripheral vasoconstriction — blood shifts to core organs
- •Vagal activation — the parasympathetic system takes control
- •Stress reset — can interrupt sympathetic dominance
In ONDA Life
Cold exposure protocols (face immersion, cold showers) leverage the Mammalian Dive Reflex to build vagal resilience. The reflex provides a biological "hard reset" that forces the autonomic nervous system to recalibrate.