Athletes smoke weed for many of the same reasons non-athletes do, but with a few sport-specific motivations layered on top: managing pain from training and injuries, calming pre-competition anxiety, and improving sleep during grueling schedules. Surveys of competitive athletes find that roughly 23% report using cannabis in the past year, yet fewer than 1% say they use it to directly boost performance. Most describe it as a recovery and mental health tool, not a competitive edge.
Pain and Inflammation After Training
The most commonly cited reason athletes turn to cannabis is pain management. Training at a high level means constant low-grade tissue damage, joint stress, and the occasional acute injury. Both THC and CBD interact with the body’s own cannabinoid receptors, which are found throughout the brain, immune system, and peripheral nerves. When those receptors are activated, the body dials down production of inflammatory signaling molecules that drive soreness and swelling after hard workouts. One study found that taking CBD before aerobic exercise appeared to reduce levels of two key inflammatory markers linked to post-exercise muscle damage.
For many athletes, cannabis feels like a more appealing option than popping anti-inflammatory pills day after day. Long-term use of over-the-counter painkillers carries real risks to the stomach, kidneys, and cardiovascular system. Cannabis is perceived as a gentler alternative, especially for chronic aches that never fully resolve during a competitive season. Whether it’s actually safer over the long haul remains an open question, but that perception drives a lot of the behavior.
The Runner’s High Is Already a Cannabinoid Effect
There’s a surprisingly direct biological link between exercise and cannabis. The “runner’s high,” that wave of calm euphoria some people feel during sustained aerobic effort, was long attributed to endorphins. Newer research tells a different story. The feeling appears to depend on the body’s own cannabinoid system rather than opioid signaling. During prolonged exercise, your body produces anandamide, a naturally occurring compound that binds the same receptors THC targets. A 2015 study showed that cannabinoid receptors, not opioid receptors, were responsible for the anxiety relief and pain reduction runners experienced after exercise.
This means athletes are already familiar with the sensation of cannabinoid receptor activation. Using cannabis after a workout essentially amplifies a process the body is already running on its own. Some athletes describe it as extending the post-exercise glow into the evening hours, easing the transition from high physical arousal to rest.
Sleep, Anxiety, and Mental Recovery
Sleep is arguably the most important recovery tool an athlete has, and it’s also one of the hardest to protect. Competition schedules, long-haul travel, pre-game nerves, and late-night events all disrupt normal sleep patterns. CBD in particular is widely used by athletes aiming to improve sleep quality and reduce the racing thoughts that come with high-stakes performance pressure.
The anxiety-relieving properties of cannabis are a major draw. Competition anxiety is not just mental discomfort; elevated stress hormones interfere with muscle repair, immune function, and the quality of sleep itself. Athletes report using cannabis to increase relaxation and promote better rest, especially during tournament stretches when games happen on consecutive days. The evidence supporting these effects is largely drawn from clinical populations rather than elite athletes specifically, but the anecdotal reports from sports are consistent enough to explain the widespread use.
Neuroprotection in Contact Sports
One of the more striking findings in recent research involves cannabis and head impacts. In a controlled study of soccer players performing repeated headers, those who were regular cannabis users showed significantly less neurological impairment afterward compared to non-users. The cannabis group maintained better eye-tracking function at 24 and 72 hours post-heading. Blood markers told the same story: a protein called S100B, which rises when brain cells are stressed, spiked in the control group but stayed flat in the cannabis group across all time points after heading.
This builds on earlier data suggesting a protective effect. A retrospective study of 446 patients with severe traumatic brain injury found that THC-positive patients had a mortality rate of 2.4%, compared to 11.5% for THC-negative patients, after controlling for other variables. The mechanism likely involves cannabinoid signaling protecting the blood-brain barrier, reducing brain inflammation, and preserving connections between neurons. For athletes in football, hockey, soccer, and combat sports, where repeated head impacts are unavoidable, this potential neuroprotective effect is a compelling reason to use cannabis, even if the research is still in early stages.
How It Affects Performance
Cannabis is not a performance enhancer in any traditional sense, and most athletes know that. In surveys, about 86% of athletes say they never use it to improve performance, and the majority believe it would actually make them worse at their sport. The data supports that belief, at least for acute use.
Occasional cannabis users show reaction times that slow by about 17 milliseconds after smoking, while sober controls actually get faster by about 21 milliseconds over the same testing period. Short-term memory also takes a hit: occasional users reproduced fewer shapes in a memory task after cannabis use, while sober participants improved. Interestingly, daily users showed much less impairment on reaction time, suggesting tolerance plays a role, but they still needed about 4.6 extra seconds to complete a decision-making task compared to their own baseline.
Cannabis also affects the cardiovascular and respiratory systems in ways that could limit performance. Inhaled cannabis irritates airways, and THC can temporarily increase heart rate. These effects make using cannabis before or during competition counterproductive for most sports. The pattern that emerges is clear: athletes use cannabis for recovery and well-being, not for game day.
What the Rules Actually Say
The World Anti-Doping Agency classifies all cannabinoids, including THC, as prohibited in competition. The in-competition window starts at 11:59 p.m. the night before an event and lasts through the end of competition and sample collection. Out-of-competition use is not prohibited under WADA rules, which is why many athletes who use cannabis do so during training blocks rather than around events.
Professional leagues in North America have loosened their stances considerably. The NFL’s standard annual drug test no longer screens for THC, though a percentage of tests under the league’s performance-enhancing substance policy still do. Players enrolled in the league’s substance of abuse program can be tested for THC up to 10 times per month. Synthetic cannabinoids remain strictly prohibited across all testing programs. The NBA stopped random marijuana testing for players in 2020 and has not reinstated it. MLB removed cannabis from its banned substance list in 2019.
This regulatory softening reflects a broader acknowledgment that cannabis use among athletes is widespread and that punishing it as if it were a performance-enhancing drug doesn’t align with the science. The shift has made athletes more open about their use, which in turn has made the topic less taboo in locker rooms and training facilities.
How Athletes Use It
Smoking a joint is the stereotype, but many athletes prefer methods that don’t involve inhaling combusted plant material. Tinctures (liquid drops placed under the tongue) are popular because they avoid any respiratory impact. Topical creams and balms applied directly to sore joints deliver cannabinoids locally without producing a psychoactive effect. Edibles offer another smoke-free option, though their delayed onset and longer duration make dosing less predictable.
The choice of method often depends on the goal. An athlete dealing with a sore knee might reach for a topical. Someone trying to sleep before a big game might use a CBD tincture. An athlete unwinding after a long training camp might smoke or vape. The trend across professional sports is toward CBD-dominant products, which provide anti-inflammatory and calming effects without the cognitive impairment that comes with THC.