It's like weird Extreme Sports
10. Ice swimming
Long lauded by the Finns, Chinese and Russians for its libido enhancing properties, this hypothermic health tonic has now become an international sport. Each year the International Ice Swimming Association holds a winter championship which attracts over 600 competitors from 21 countries. But for some risking heart attack, unconsciousness, or death alongside a whole bunch of coldness cranks just doesn’t cut it. As Dutch iceman Wim Hof can attest. In March 2000 he bagged himself a Guinness World Record by swimming 57.5 metres under ice (http://www.youtube.com/watch?v=jfCsSDiPZxk). Imagine a frozen Olympic swimming pool - but seven metres longer. The trick? To prevent his core body temperature from dipping deathly low the ice-meister mastered the Tibetan art of Tummo meditation - a scientifically proven method of increasing body heat.