What would be the point?

When is a performance-enhancing drug not a performance-enhancing drug?  When it doesn't enhance performance, I would suggest.  The question has arisen because a Russian curler has been sent home in disgrace for testing positive for meldonium (which, by the way, was the drug that Maria Sharapova fell foul of).  Thing is, meldonium is banned because it increases your ability to exercise hard, but curling is all a matter of craft and accuracy, and strength doesn't really come into it.  Even other curlers have questioned whether any drug could enhance your performance as a curler.  Beta blockers perhaps but that's about it.  Otherwise you might just as well have a nice cup of tea.