Christine Mboma: Wins Olympic silver after being barred from her preferred race

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Namibia's Christine Mboma claimed an historic silver medal in the 200m, just weeks after being informed she could not compete in her preferred 400m due to high levels of testosterone. She has became the first Namibian woman ever to win an Olympic medal. Both Christine and fellow Namibian teenager Beatrice Masilingi were withdrawn from the 400m because of naturally high testosterone. The rules for athletes with Difference of Sexual Development (DSD) state that DSD women must reduce their naturally elevated testosterone levels to compete at distances from the 400m up to the mile. Caster Semanya, an athlete from South Africa, is barred from competing in the 800m for the same reasons and is currently appealing to the Court of Human Rights. BBC's Sports Africa reporter, Celestine Karoney, explains what happened at Tokyo, and how the two athletes are planning for the future. Photo: Silver medalist Christine Mboma of Namibia celebrates winning silver in the women's 200m in Tokyo Credit: Reuters