Here is an interesting analysis of doping in athletics and sprinting

Cycling and sprinting. Which sport is worse for doping?

While cycling's Team Sky have been forced to deny doping, the athletics world has seen the two fastest men this year fail drugs tests. How far does doping affect each sport?

Seven time Tour De France winner Lance Armstrong, who admitted to doping earlier this year. Photograph: John Giles/PA

It has not been a good few weeks for the reputations of cycling and 100 metre sprinting.
The ghost of Lance Armstrong's dope-fuelled achievements has haunted Team Sky and its British Tour de France leader Chris Froome all the way on their trip through the mountains.

Full Guardian article here

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