A determined Caster Semenya has decided to race the 3,000 meters at the Diamond League Prefontaine Classic on June 30 after she has been recently barred from running her main event 800 meters. 

The two-time Olympic champion from South Africa is allowed to run the longer distance without reducing her testosterone levels.

Unfazed by the recent ban on her running the 800 meters, the event saw her winning two successive Olympic gold medals in both 2012 and 2016. Semenya has insisted that she will not take medication to comply with the new International Association of Athletics Federations (IAAF) rules governing testosterone levels in women athletes that went into effect on May 8.

Last year, the IAAF introduced a rule limiting blood testosterone levels for women with some types of DSD, in which they have a Y chromosome and are sensitive to testosterone (technically, 46, XY DSD women under the IAAF regulations), in races from 400 meters to one mile (1.6 kilometers).

These regulations have been implemented on all international competitions, including the World Championships and the Olympics. However, on April 30, the Court of Arbitration for Sport (CAS) in Lausanne, Switzerland, dismissed Semenya's appeal against the IAAF rule before an infuriated South African governing body for athletics said that they filed another appeal with the Switzerland Federal Tribunal citing lack of clarity over how the rules can be implemented.

As per the new IAAF rules, women with higher than normal male hormone levels – so-called "hyperandrogenic" athletes – must artificially lower the amount of testosterone in their bodies if they take part in races within the 400 meters to the one mile bracket.

Semenya won the 800 meters at the Doha Diamond League meeting earlier this month in her first race since losing her appeal of the controversial ruling at the CAS.

With the ruling sparking a massive global outrage, the Prefontaine 3,000 meters will be Semenya's first race since the rules have come into effect. Prefontaine Classic meet director Tom Jordan said Semenya's agent reached out to meet officials asking if she could start in the 3,000 meters.

"We were happy to oblige," Jordan informed news agency AFP.

At the Prefontaine Classic, which will be held in Stanford, California, U.S., Semenya will be pitted against some of the big names, including world 5,000-meter champion Hellen Obiri of Kenya, 2016 world indoor 1,500-meter champion Sifan Hassan of Ethiopia, and her compatriot Genzebe Dibaba, who championed the 2018 world indoor 1,500 and 3,000 meters.