Plunge into water at near-freezing temperatures, and your body goes into extreme distress. Your skin screams signals of pain. You can't breathe, because your chest is cramping up. Talking is nearly impossible. Your heart is pounding. Fear mounts -- as it should. Without any protection, you may lose consciousness in under 15 minutes. You'll be dead within an hour.


원문출처 : https://www.cnn.com/2018/04/20/health/winter-ice-swimming-sweden-sport-fit-nation/index.html