On average, runners were 3.1% faster in the CBD trial than in the placebo. That’s not trivial in the real world—if you’re running ~7:55/mile, that’s roughly ~30 seconds over two miles. But the study couldn’t confidently say CBD reliably improves time trial performance (the findings were “not statistically significant). Still, the direction of the effect is interesting, and 10 of the 12 runners ran faster with CBD.