Cannabis remains prohibited in competitive sports despite no evidence it enhances athletic performance, with detection complicated by THC's prolonged excretion time.
What the researchers found
This review examined the rationale behind cannabis prohibition in competitive sports and the practical challenges of enforcing that ban. The authors found no scientific evidence that cannabis enhances athletic performance.
Despite the lack of ergogenic effects, cannabis remained on the World Anti-Doping Agency's prohibited list based on other criteria, including the argument that it violates the spirit of sport and poses health risks to athletes.
A major practical challenge was THC's unusually long excretion time. Because THC is fat-soluble and stores in body tissue, it can be detected in urine for days or weeks after use, long after any psychoactive effects have worn off. This made it difficult to distinguish recent use from past use and raised fairness questions about testing thresholds.
Why it matters
The disconnect between cannabis's lack of performance-enhancing effects and its continued prohibition in sports reflects broader debates about drug policy. The detection challenges highlighted here remain relevant as more jurisdictions legalize cannabis and athletes advocate for policy reform.
The numbers in context
No proven performance enhancement was identified. THC's fat-soluble nature causes protracted excretion times that complicate drug testing interpretation.
How the study worked
This was a narrative review published in a sports medicine journal. The authors surveyed the scientific literature on cannabis and athletic performance, examined anti-doping policies, and analyzed the pharmacokinetic properties of THC that complicate detection and testing.
What this study cannot tell us
The review was published in 2006, before many jurisdictions legalized cannabis and before WADA raised its urinary THC threshold in 2013. Limited research existed on cannabis effects during athletic performance specifically. The review did not address potential recovery or anti-anxiety benefits some athletes report.
How to read the evidence
A narrative review of sports policy and pharmacokinetics, providing moderate evidence that cannabis prohibition in sports lacks a performance-enhancement rationale.
The bigger picture
This paper highlighted a fundamental tension in sports drug policy: banning a substance without evidence of performance benefit. The issues raised here foreshadowed later policy changes, including WADA's 2013 decision to raise the THC detection threshold tenfold and ongoing debates about removing cannabis from prohibited lists entirely.
Common questions
Can cannabis help athletes perform better?
Why can THC be detected so long after use?
Read the original research
Cannabis and sport.
British journal of sports medicine, 40 Suppl 1(Suppl 1), i13-5
Citation
Saugy, M; Avois, L; Saudan, C; Robinson, N; Giroud, C; Mangin, P; Dvorak, J. (2006). Cannabis and sport.. British journal of sports medicine, 40 Suppl 1(Suppl 1), i13-5.