Hot environments under athletic competition can present an athlete severe challenges. Heat exhaustion may be complex and difficult to fully comprehend because athletes are variably affected during high-intensity exercise in hot humid environments. Avoidance is the best cure; however adhering to known measures will limit approaching dangerous overheating levels. Current knowledge depends on the judicious field documentation of athletes who push beyond normal physiological limits. For example, EHS, the most severe form of heat illness, cannot be studied in the laboratory because the risks of severe hyperthermia are ethically unacceptable for human research. The survival of athletes reaching such limits depends on the early recognition and effective cooling therapy as highlighted by Prehab USA by clicking here.
Her is attached also a position stand on Exertional heat Illness from the American College of Sports medicine.
There are a few reviews of the available literature on Precooling and its application published in Sports Medicine.