Although all these techniques are popular all over the world, many doctors warn of the high risk of injury involved. Perhaps some of us could initially settle for a cold foot-bath to give our immune system and circulation a boost. There’s no need to think you have to break the world record for surviving extreme cold (like the famous Iceman, Wim Hof). A holistic health practice may test your limits but it should never involve unnecessary risk. Besides, low temperatures alone are not enough. Swimming every day, a healthy, balanced, fish-rich diet, lots of sunlight and fresh air will also have their part to play in the pearl divers’ sprightliness as they jump into the water aged 70 and over. We can learn so much more from their lifestyle than just a hankering for an icy bath.