Athletics has been hit by more allegations of cheating. The Sunday Times and a German broadcaster say a massive leaked database shows "the extraordinary extent of cheating by athletes at the world's most prestigious events". The information is based on 12,000 tests of more than 5,000 athletes between 2001 and 2012. It's been called the "biggest leak of blood-test data in sporting history". The data reveals that more than a third of medals - including 55 golds - have been won at the Olympics and world championships by athletes who've recorded suspicious tests. Russia accounted for 415 abnormal tests, followed by Ukraine, Morocco, Spain, Kenya, Turkey and others Doping basically means athletes taking illegal substances to make their performance better. There are five types of banned drugs, called doping classes. The most common are stimulants and hormones. Although they enhance performance, they are health risks involved in taking them and they're ...