In addition, there have been instances of ice bathing as an extreme bodily test by persons vying for an endurance record, such as Dutch Iceman Wim Hof,[43] and Chinese record-holders Chen Kecai[44] and Jin Songhao.[45] According to reports, doctors and scientists are studying how these people can spend an hour and a half submerged in an ice bath, and survive; for almost all humans, such tasks are impossible.