"It's winter on the tiny Korean island of #Jeju, which means the sea urchins are plentiful. For hours, the women agilely and efficiently harvest sea creatures while the air above the waterline hovers around 30 degrees Fahrenheit (negative 1 degree Celsius). These are the haenyeo — the "sea women" of #SouthKorea. And they are a dying breed."

Korea's #Haenyeo Female #Freedivers Brave Freezing Waters and a Changing Culture | HowStuffWorks
https://people.howstuffworks.com/culture-traditions/national-traditions/haenyeo-female-divers-korea-unesco.htm

Elite Freedivers Beat #Seals During Deep Dives – Incredible Heart Rates and Brain Oxygen Levels

Back in 2021, McKnight et al. published a paper in which they used a special device, the PortaDiver, to make #NIRS measurements with elite #freedivers. This one-of-a-kind device is a modified version of the PortaLite mini, and was made by request for this specific study.

#diving #sport #research #hemodynamics #brain #fNIRS #HR