ANCIENT ORIGINS
The Aquatic Ape Theory: Humans May Have Evolved at the Water's Edge
When a person puts a face into cold water and holds the breath, the heart usually slows. Blood vessels in the hands and feet narrow to save oxygen for the heart and brain.
Read in Vietnamese →When a person puts a face into cold water and holds the breath, the heart usually slows. Blood vessels in the hands and feet narrow to save oxygen for the heart and brain. The spleen can contract and push more red blood cells into the blood. The body starts this diving response the moment the face meets water, even in babies.
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