Simone Biles reveals she has ADHD after Russian hacker group leaks medical records

After Russian hackers leaked medical records of U.S. Olympic athletes, gold medal-winning gymnast Simone Biles is coming clean about her own medication use for attention-deficit/hyperactivity disorder.

The Huffington Post reported that Biles made the announcement Tuesday confirming that she has ADHD and that it is something she has been taking medication for since she was a child.

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"I have ADHD and I have taken medicine for it since I was a kid. Please know I believe in clean sport, have always followed the rules, and will continue to do so as fair play is critical to sport and is very important to me," Biles said in a social media statement. "Having ADHD, and taking medicine for it is nothing to be ashamed of nothing that I'm afraid to let people know."

BBC reported Tuesday that the hacker group, calling itself "Fancy Bears," claimed responsibility for the hack of the World Anti-Doping Agency, or WADA, that leaked confidential medical files of Biles and tennis superstars Venus and Serena Williams.

WADA confirmed the hack in a statement Tuesday.

"The group accessed athlete data, including confidential medical data -- such as Therapeutic Use Exemptions delivered by International Sports Federations (IFs) and National Anti-Doping Organizations (NADOs) -- related to the Rio Games; and, subsequently released some of the data in the public domain, accompanied by the threat that they will release more," the statement said.

"While it is an evolving situation, at present, we believe that access to (the Anti-Doping Administration and Management System) was obtained through spear phishing of email accounts; whereby, ADAMS passwords were obtained enabling access to ADAMS account information confined to the Rio 2016 Games. At present, we have no reason to believe that other ADAMS data has been compromised."

USA Gymnastics, the national governing body of gymnastics in the county, confirmed that Simone went through the proper channels and followed U.S. Anti-Doping Agency and WADA requirements.

"Simone has filed the proper paperwork per USADA and WADA requirements, and there is no violation," Steve Penny, president of USA Gymnastics, said in a statement. "The International Gymnastics Federation, the United States Olympic Committee and USADA have confirmed this. Simone and everyone at USA Gymnastics believe in the importance of a level playing field for all athletes."