noun - Anticipatory thermogenesis is the ability to mentally generate an increase in one's core body temperature. The term was first described by Professor Tim Noakes of the University of Cape Town when he recorded Lewis Pugh's ability to raise his core body temperature by nearly 2°C in anticipation of entering the freezing water during his swims in Antarctica. Anticipatory thermogenesis or the creation of heat before an event is a phenomenon that had not been noted in any other human. Pugh believes it is a Pavlovian Response to years of cold water swimming.
Before he jumped in the frozen lake, he prepared through anticipatory thermogenesis.