A majority of the approximately 40 sprinters, swimmers and weightlifters competing in the "doping games" have taken combinations of testosterone, anabolic steroids or other substances not permitted in other sporting events, such as the Olympics.
But after the women's 50-meter freestyle was held, Sarah Sjöström's world record of 23.61 seconds remains unthreatened - even now that the competitors have had free rein to dope.
Colombian Isabella Arcila crossed the finish line in 25.11 seconds and thus missed out on a $1 million bonus, but can still console herself with $250,000.
Nor has a world record been broken in any of the other disciplines decided so far.
