[danielf]

Originally Posted by nomadking

You don't need to take muscle building drugs during any competition, but in the training leading up to it. The muscle building affect remains and can be maintained(for years?) by exercise. Drug levels will have gone down by competition time.

Yes, that's why athletes are tested out of competition as well. Contador has only tested positive once, and that test only revealed traces of Clenbuterol. So far, the evidence does not suggest he willfully took a performance enhancing substance.