the illegal practice of removing a quantity of blood from an athlete long before a race and reinjecting it shortly before a race, so boosting oxygenation of the blood
blood doping in American English
(ˈdoʊpɪŋ)
the practice of draining and freezing a person's blood and then restoring it just prior to intense physical effort, esp. to an athlete just before competition, so as to improve endurance by the sudden, temporary increase in red blood cells available for carrying oxygen