Arzamasova, who is from Belarus, won the 800 meters at the 2015 worlds in Beijing, and was the 2014 European champion. She placed seventh at the 2016 Rio de Janeiro Olympics. The AIU said Arzamasova's case involves LGD-4033, better known as Ligandrol. The drug has been in clinical trials to treat muscle wasting conditions. It is reportedly used in supplements by body builders to build muscle mass with fewer side effects than steroids.
In a separate case, the AIU said re-testing a sample from the 2011 world championships led to shot putter Andriy Semenov being banned for two years by Ukrainian authorities. Semenov tested positive for oral turinabol, an anabolic steroid, and is banned through July 21, 2021. The 35-year-old Semenov competed at the 2008 and 2012 Olympics though he did not qualify for the final either time.
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