Last summer, the Court of Arbitration for Sport suspended track and field’s regulations on hyperandrogenism, a medical condition which causes high levels of hormone production, for women athletes. So runners like Caster Semenya of South Africa, who has the condition, no longer must take medications that suppress testosterone levels. Semenya, who won silver in London, is the overwhelming favorite in this race . She could even break a world record. But she may never outrun controversy : does her body give her too much of an advantage? Or is she a victim of a double standard? And why don’t we ask that same question about other athletes with exceptional gifts, like Bolt?