How extreme heat affects athletes’ health and performance

This simulation considers an athlete’s ability to regulate heat in extreme heat and humidity. A temperature of above 38 degrees C (100.4 F) is considered feverish and research shows that humans need to maintain their core temperature between 35 and 39 (95 and 102.2 F) for optimal functioning of biochemical reactions. It uses computational fluid dynamics (CFD) to reproduce conditions in Japan’s national stadium in summer, and the Joint System Thermoregulation Model to calculate the skin and muscle temperatures throughout their body and dehydration during a 10,000m race.