Detail in leaked document cuts down Russian skater Kamila Valieva’s excuse for doping controversy

Russian Kamila Valieva listed two legal substances used to improve heart function on an anti-doping form before her case at the Winter Olympics erupted, according to documents.

The World Anti-Doping Agency filed a brief in the star figure skater’s case.

In the video above: Russian skater Kamila Valieva leaves the ice in tears amid doping case

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It stated that the existence of L-carnitine and Hypoxen, while they are legal substances, undercuts the argument that a banned substance, trimetazidine, might have entered the skater’s system accidentally.

Hypoxen is a drug designed to increase oxygen flow to the heart.

It was a substance the US Anti-Doping Agency unsuccessfully tried to have added to the banned list.

L-carnitine, another oxygen-boosting performance enhancer, is banned if injected above certain thresholds. The supplement was the focal point of the doping case involving track coach Alberto Salazar.

Combining those with 2.1 nanograms of trimetazidine, the drug found in Valieva’s system after a December 25 test, is “an indication that something more serious is going on,” USADA chief executive Travis Tygart said.

“You use all of that to increase performance,” he said, adding “it totally undermines the credibility” of Valieva’s defence.

Two people with knowledge of the case told The Associated Press that a brief seen by AP that was filed by the World Anti-Doping Agency in a hearing on Valieva’s case was authentic.

The people spoke on condition of anonymity because the document was not publicly available. WADA would not comment on the brief.

Valieva’s mother argued that the skater’s grandfather was a regular user of trimetazidine, which