How prevalent is doping in cycling today?

Pretty common, but it's pretty sophisticated and very difficult to detect so you have to take my statement with a grain of salt. read more

"One respected cycling professional felt that even today, 90 per cent of the peloton was doping," it added. "Another put it at around 20 per cent." Under fire: Former UCI president Pat McQuaid is criticised . Just as alarming are similar claims being made about women's, youth and amateur cycling. read more

Doping means athletes taking illegal substances to improve their performances. There are five classes of banned drugs, the most common of which are stimulants and hormones. There are health risks involved in taking them and they are banned by sports' governing bodies. read more