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Researchers studied the Haenyeo, all-female free divers on Jeju Island, South Korea, to understand their ability to endure extreme diving conditions. The study, published in Cell Reports, revealed physiological and genetic adaptations, including a significant heart rate drop during simulated dives and two specific genes linked to cold tolerance and blood pressure regulation. These adaptations, potentially shaped by generations of diving, also appear prevalent in the broader Jeju population, suggesting a possible connection to the island's low stroke mortality rate. The findings highlight the unique biology of the Haenyeo and offer potential implications for therapeutic development related to stroke prevention.

Prepared by Olivia Bennett and reviewed by editorial team.