Doping tends to dominate cycling - we look at the history of doping in the Tour de France leading up to the 2007 race. It doesn't make for encouraging reading.

Cycling and drug use have become synonomous. FitnessDoc traces the history of drug use and reveals some startling historical cases which shed light on a culture of drugs.

A look at just one of the many drugs scandals that hit the 2007 Tour de France - Alexander Vinokourov testing positive for blood doping

The biggest sports drug bust ever took place in the US a few months ago. Just the tip of the iceberg? Is it true that there will be 100 undetectable drugs at the Beijing Olympics?

The 2009 Tour de France kicks off, Dr Ross Tucker takes a look at last year's race, which was rocked by doping scandals, and contemplates the somewhat rocky future of cycling.