The Court of Arbitration for Sport is hearing a challenge by the South African runner, Caster Semenya, to plans that would force some female runners to lower their testosterone levels.
Sebastian Coe, the president of the world athletics governing body, the IAAF, said the proposed new rules would make athletics fairer. They’d make women with hyper-androgynism, an elevated level of male hormones, take medication before they compete.
Semenya’s lawyers argue that this would be discriminatory, and that the world and Olympic champion’s genetic condition should be celebrated instead.
