UK sprinter Dwain Chambers faces the race of his life next month, as he attempts to win an Olympic medal at the 2012 games in London-and complete a long journey back from the disgrace of his 2003 suspension for doping. Chambers, who has devoted much of his time since then to persuading others to steer clear of performance-enhancing drugs, has admitted to using six different substances banned by the sporting authorities. These included two anabolic steroids-a designer drug and a testosterone cream-to accelerate recovery; the hormone erythropoietin (EPO), which increases production of red blood cells, to allow him to do more repetitions in training;
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