Wim broke his previous world record by staying for 1 hour 13 minutes and 48 seconds immersed in ice at Guinness World Records 2008. The night before, he performed the act on the Today Show. Dr. Kenneth Kamler monitored the event to explain the effects of using the Tantric practice Tummo to control your body temperature. Tummo has been practiced by Yogi monks in Tibet. Apparently Wim is the only known non-monk to have mastered Tummo. Wim describes his ability to withstand extreme cold temperatures as being able to turn his own thermostat up by using his brain.
Wim Hof has recently broke the ice indurance record by standing fully immersed in ice for 1 hour and 31 minutes in Lelystad/holland in may 2008 He was subjected to an experiment where they drew blood from him whilst in meditation and found out that he creates antibodies, which implicates a possible breakthrough in medicine and fighting disease
He has four children with his late wife, and one child with his present girlfriend.