BMX athlete receives sanction

  • Doping Violation Update

Sport Integrity Australia acknowledges the decision of AusCycling to sanction BMX athlete Luke Marsh for the presence of a Prohibited Substance and/or its metabolites or markers, and the use of a Prohibited Substance.

Mr Marsh returned an Adverse Analytical Finding (AAF) from an in-competition doping control test on 24 May 2019.

His sample was analysed at the Australian Sports Drug Testing Laboratory, part of the National Measurement Institute, which detected the presence of Clenbuterol, Bis (4-cyanophenyl) methanol (metabolite of Letrozole) and Exogenous Androsterone, Etiocholanolone and 5β-androstane-3α,17β-diol.

It was found that Mr Marsh used Prohibited Substances, namely Clenbuterol, Letrozole and Testosterone, on and/or before 24 May 2019.

Clenbuterol, Letrozole and Testosterone are prohibited in and out-of-competition.

AusCycling imposed a four-year ban on Mr Marsh commencing on 24 May 2019.

Mr Marsh will be eligible to return to competition on 24 May 2023.

Additional information on the prohibited substance


Clenbuterol and Testosterone are classed as S1 anabolic agents on the Prohibited List and are prohibited in and out-of-competition.

Anabolic agents pose many threats to an athlete’s health and some side effects may include an increase in blood pressure and cholesterol levels which can lead to heart disease. Liver disease and infertility can also result from the use of these agents.


Letrozole is classed as a S4 Hormone and Metabolic Modulator and is prohibited in and out-of-competition. Athletes taking Letrozole can experience nausea, vomiting, loss of appetite, constipation, diarrhoea, and heartburn.

Sport Integrity Australia is committed to protecting the right of clean athletes to fair competition.

If you are aware of any suspicious doping activity, you can: 

Sport Integrity Australia recommends athletes check substances and medications before taking them and to follow our advice on any sport supplements

The Sport Integrity app provides a useful resource for athletes and support staff to check substances and medications. Additionally, it provides information on how to find batch-tested supplements or see if a Therapeutic Use Exemption (TUE) is required.

The Sport Integrity app is available for free download via the App Store and on Google Play

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