Caster Semenya won 5,000m gold at the South African Athletics Championships – a new distance that would not require her to lower her testosterone levels.
The double 800m Olympic gold medallist is challenging athletics’ governing body over its regulation restricting testosterone levels in female runners.
The Court of Arbitration for Sport is due to deliver a verdict on Semenya’s appeal by the end of April.
Semenya, 28, also cruised into Friday’s 1500m final.
Under IAAF rules, female athletes with naturally high testosterone levels would have to race against men or change events unless they took medication to reduce those levels.
The regulations will apply to women in track events from 400m up to one mile and require athletes to keep their testosterone levels below a prescribed amount “for at least six months prior to competing”.
Semenya has previously been asked to undertake gender testing by athletics chiefs, but no results have officially been made public.