Where does this end? Elite athletes probably have specific genes which helps with sorting out athletic ability, reaction time, height, muscle building, endurance. Biologically abnormal just means more than average by some amount. Where do they land on the bell curve. Where do you make the cutoff? Unless she wins the gold is there even an argument to be made that it gives her unfair advantages? And even if she does win the gold then you have to determine whether the advantage she has is abnormal enough to disqualify her from competing.