Research on the Haenyeo, traditional female divers from Jeju Island, reveals significant genetic adaptations aiding in blood pressure regulation during diving. An international study identified a genetic variation in these divers that may protect them from blood pressure spikes encountered while diving. This knowledge could pave the way for novel therapies for individuals at risk of strokes. The Haenyeo, known for their remarkable diving stamina and resilience, face declining numbers, with most divers now being elderly, indicating a loss of this rich cultural practice and its biological advantages.
Now, an international team of researchers has found evidence of natural selection at work: a genetic variation found in Jeju Islanders that helps to keep their blood pressure from rising as much when diving.
Understanding the genetic adaptation could lead to the development of medications that help people at risk for stroke or blood pressure problems.
Evolution seems to have found a way to balance this out - a genetic variant that may protect divers while they're holding their breath and beyond.
The practice is dying out, and most of those diving in the 50-degree waters today are in their 60s, 70s and 80s.
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