Diving reflex
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The diving reflex, also known as the mammalian dive response, is a physiological reaction triggered when a person submerges into cold water. This response primarily aims to conserve oxygen and protect the body in a cold environment. Here are the key mechanisms and impacts discussed by and :
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Activation of Parasympathetic System: Submerging into cold water activates the parasympathetic nervous system, which is responsible for the 'rest and digest' functions. This leads to various physiological changes intended to conserve energy and oxygen.
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Reduced Heart Rate: Part of this parasympathetic activation includes a reduction in heart rate, which helps reduce oxygen consumption throughout the body.
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Conservation of Oxygen: The diving response helps to slow down the body’s oxygen consumption. This serves as a protective mechanism to prevent hypothermia and to enable longer periods under water without breathing.
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Mental Balance: After emerging from water, people often report a sense of mental balance and well-being. This effect is attributed to the activation of the chemicals like serotonin in the brain, although exact processes and individual variations might need further studies for a clear understanding.
The diving response is therefore a complex interaction of physiological changes that serves a protective and survival function when the body is exposed to a cold aquatic environment 1.
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