THC Generally Hurts Sports Performance Despite Being on the Anti-Doping Prohibited List
A review found that while caffeine enhances exercise performance, THC is generally ergolytic (performance-impairing) despite being on the World Anti-Doping Agency prohibited list, with only theoretical performance benefits under specific circumstances.
Quick Facts
What This Study Found
The review compared four commonly used drugs' effects on exercise performance. Caffeine had strong evidence as an ergogenic (performance-enhancing) aid. Nicotine had preliminary ergogenic evidence. Alcohol and THC were generally ergolytic (performance-impairing) but could theoretically enhance performance under specific circumstances.
THC was on the WADA prohibited list, yet the evidence suggested it impairs most performance measures: reduced reaction time, impaired motor coordination, decreased strength, and altered cardiovascular response to exercise. The theoretical ergogenic circumstances were limited to potential anti-anxiety effects that might benefit sports requiring calmness, and its role in recovery through pain and inflammation reduction.
Key Numbers
Caffeine: ergogenic (strong evidence). Nicotine: potentially ergogenic (preliminary). THC: generally ergolytic, on WADA prohibited list. Alcohol: generally ergolytic. THC impairs: reaction time, motor coordination, strength, cardiovascular response.
How They Did This
Narrative review evaluating ergogenic and ergolytic evidence for caffeine, nicotine, ethanol, and THC. Examined mechanisms of action, physiological effects, and impact on recreational and elite sports performance.
Why This Research Matters
The discrepancy between THC's prohibition by WADA and its actual performance-impairing effects raises questions about the rationale for its prohibition. If THC is ergolytic, athletes who use it are disadvantaging themselves, challenging the fairness-based argument for prohibition.
The Bigger Picture
This review contributed to the ongoing debate about THC's place on the WADA prohibited list. The evidence suggests its prohibition is based more on social/legal considerations than on performance-enhancing potential, which is inconsistent with the stated purpose of anti-doping regulations.
What This Study Doesn't Tell Us
Narrative review may not capture all relevant studies. THC effects vary by dose, timing, tolerance, and individual sensitivity. Most exercise-THC studies were conducted in non-athletes. The specific circumstances where THC might be ergogenic are theoretical rather than demonstrated. Chronic versus acute use may have different effects.
Questions This Raises
- ?Should THC be removed from the WADA prohibited list?
- ?Could cannabinoids play a legitimate role in athletic recovery?
- ?Do elite athletes who use cannabis perform worse than those who do not?
- ?How does chronic cannabis use affect long-term athletic capacity?
Trust & Context
- Key Stat:
- THC impaired reaction time, motor coordination, strength, and cardiovascular response to exercise
- Evidence Grade:
- Narrative review of exercise physiology studies; moderate evidence for ergolytic effects of THC.
- Study Age:
- Published in 2013. WADA has since raised the THC testing threshold but kept it on the prohibited list.
- Original Title:
- The effects of caffeine, nicotine, ethanol, and tetrahydrocannabinol on exercise performance.
- Published In:
- Nutrition & metabolism, 10(1), 71 (2013)
- Database ID:
- RTHC-00717
Evidence Hierarchy
Summarizes existing research on a topic.
What do these levels mean? →Frequently Asked Questions
Does cannabis help or hurt athletic performance?
It generally hurts. This review found THC impairs reaction time, motor coordination, strength, and cardiovascular response to exercise. The only theoretical benefits were reduced anxiety (potentially helpful in precision sports) and anti-inflammatory effects for recovery. If you are trying to maximize performance, cannabis is working against you.
Why is THC on the anti-doping prohibited list if it hurts performance?
This is a legitimate question raised by this review. WADA prohibits substances that meet two of three criteria: performance-enhancing, health risk, or contrary to the "spirit of sport." THC is likely prohibited under health risk and spirit-of-sport criteria rather than performance enhancement. The review notes this is inconsistent with focusing on competitive fairness.
Read More on RethinkTHC
Cite This Study
https://rethinkthc.com/research/RTHC-00717APA
Pesta, Dominik H; Angadi, Siddhartha S; Burtscher, Martin; Roberts, Christian K. (2013). The effects of caffeine, nicotine, ethanol, and tetrahydrocannabinol on exercise performance.. Nutrition & metabolism, 10(1), 71. https://doi.org/10.1186/1743-7075-10-71
MLA
Pesta, Dominik H, et al. "The effects of caffeine, nicotine, ethanol, and tetrahydrocannabinol on exercise performance.." Nutrition & metabolism, 2013. https://doi.org/10.1186/1743-7075-10-71
RethinkTHC
RethinkTHC Research Database. "The effects of caffeine, nicotine, ethanol, and tetrahydroca..." RTHC-00717. Retrieved from https://rethinkthc.com/research/pesta-2013-the-effects-of-caffeine
Access the Original Study
Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.
This study breakdown was produced by the RethinkTHC research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.