It's amazing how in a generation or two, top level skaters have moved from doubles to quads. No doubt it's mostly due to improvements in training, but as a purely theoretical question:
Is there any reason to believe that banned performance enhancing drugs (including substances derived from the athlete's own bloodstream) occur at the top levels of figure skating?
How frequently does the typical figure skating athlete who goes to Nationals get tested for performance enhancing drugs?
Same question for ISU Grand Prix?
This gives some ISU and USFSA rules, but actual testing frequency isn't discussed. E.g., it's not all that clear whether they are likely to be tested out of season.
Has any well known skaters failed tests within the past decade?