Olympian says it is 'unfair' transgender runner beat women in marathon after competing as a male in the past

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Two-time Olympian Mara Yamauchi has voiced her displeasure after a transgender athlete beat thousands of women in the female category of the London Marathon.

Yamauchi finished in sixth place in the marathon at the Beijing Olympics in 2008 while representing her home country of Great Britain. Yamauchi did not mince words when she spoke on transgender racer Glenique Frank's win at the marathon over the weekend.

"Males in the [female] category is UNFAIR for females," Yamauchi wrote in a tweet.

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Mara Yamauchi of Great Britain finishes tenth during the 2010 Virgin London Marathon on April 25, 2010 in London, England.  (Christopher Lee/Getty Images)

"Nearly 14,000 actual females suffered a worse finish position [because] of him," Yamauchi wrote on Twitter.

She also pointed out that during her time as the second ranked women in the world that in her estimation there were "at least 1300 men ran faster than me."

Yamauchi also noted that United Kingdom Athelics applied World Athletics' rules on the exclusion of transgender women from elite female competitions. She believes this practice made it "fair for athletes who have gone through male puberty to be excluded from the female category in athletics."

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On the other hand, the rules permitted athletes who had already entered events to still run in certain categories, even if it was not in their biological sex.

"This male competed under U.K. Athletics’ transitional arrangements, but it is still wrong and unfair," Yamauchi told Telegraph Sport.

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