Cannabis and Sport: What Research Actually Says

Cannabis and sport – a combination that was taboo just a few years ago. Today, professional athletes publicly discuss CBD for recovery, and recreational athletes wonder whether cannabis helps or harms their training. The research picture is more nuanced than public discussion suggests.

## The WADA Decision: CBD Is No Longer Doping

The World Anti-Doping Agency (WADA) removed CBD (cannabidiol) from its prohibited list in 2018. CBD is therefore considered a permitted substance in competitive sport. THC, however, remains prohibited – during competition periods, the threshold is 150 ng/ml urine (a significantly higher threshold than before, but still a ban).

Important for athletes: WADA's permission for CBD refers to pure CBD. Full-spectrum extracts and other cannabis products may contain traces of THC that trigger doping controls. Athletes using CBD products in competitive sport should use only certified, THC-free preparations (Kölner Liste, Informed Sport).

## CBD for Recovery: Potential and Limitations

Many athletes use CBD primarily for recovery. The theoretical basis is plausible: CBD has anti-inflammatory properties (through inhibition of inflammatory mediators and CB2 receptor activation), can improve sleep quality (which in turn promotes recovery), and shows muscle-relaxing effects in studies.

What studies show: Research on CBD and sport is still sparse – most studies are small, short or conducted with animals. A 2020 review (McCartney et al., Sports Medicine) concludes that CBD preparations may have analgesic (pain-relieving) and anti-inflammatory properties, but clinically robust data for athletic recovery are still lacking.

Practical assessment: CBD is unlikely to cause harm and could improve sleep quality and subjective well-being in some athletes. It is not a miracle cure that dramatically accelerates recovery.

## THC and Athletics: More Risks Than Benefits

THC has a mixed relationship with sport. On one hand, many recreational athletes report improved focus and reduced perception of pain and exertion during calmer activities (yoga, hiking, swimming). On the other hand, THC demonstrably impairs:

Coordination and reaction time: THC slows reaction time and impairs motor coordination. For sports with a high injury risk (climbing, cycling, combat sports), THC impairment is a serious safety risk.

Heart rate: THC increases heart rate by 20–30% for 1–2 hours after consumption. During intense exercise, this increases cardiovascular strain. For people with heart conditions or high blood pressure, this is concerning.

Motivation and fatigue: Long-term, regular THC use can affect motivational aspects. The so-called amotivation syndrome is contested in research, but some studies show lower training motivation in regular users.

Lung function: Smoking cannabis – regardless of THC – is associated with bronchitis symptoms and reduced lung function. For endurance sports, this is clearly disadvantageous. Vaporising reduces this risk but does not eliminate it entirely.

## Pain and Cannabis in Sport

Chronic overuse pain, delayed onset muscle soreness (DOMS), arthritic complaints – many athletes use cannabis as a pain reliever, often as an alternative to NSAIDs (ibuprofen, aspirin) or opiates.

Evidence for cannabis as a pain therapeutic is stronger than for recovery – particularly for neuropathic pain and inflammatory pain. However, sport-specific research is also sparse here. What works for clinical pain patients is not automatically transferable to sports-related pain.

Pragmatic assessment: Cannabis as an occasional pain reliever after sport is probably safer for healthy adults than regular NSAID use. Regular dependence on cannabis for pain management should be medically supervised.

## Summary: For Which Athletes Might Cannabis Be Beneficial?

CBD (legal, without THC): Recovery, anti-inflammation, sleep improvement. No known risks with moderate use. Permitted in competitive sport (with THC-free products).

Cannabis (with THC) in recreational sport: Experienced as beneficial by some for yoga, hiking, more relaxed activities. Not suitable for technical sports, motorsport, climbing. Never drive a vehicle under THC influence (3.5 ng/ml threshold in blood serum).

Cannabis as pain therapy: Can be sensible but should be medically supervised when used regularly.