Well, rr, I'll see your 'scientific' and raise you with my 'scientific'.
www.ncbi.nlm.nih.gov/pmc/articles/PMC3717337/
(oooh, look, same website)
Clearly, cannabis induces euphoria, improves self-confidence, induces relaxation and steadiness and relieves the stress of competition. Cannabis improves sleep and recovery after an event, reduces anxiety and fear and aids the forgetting of negative events such as bad falls and so forth. Cannabis increases risk taking and this perhaps improves training and performance, yielding a competitive edge. Cannabis increases appetite, yielding increased caloric intake and body mass. Cannabis enhances sensory perception, decreases respiratory rate and increases heart rate; increased bronchodilation may improve oxygenation of the tissues. Finally, cannabis is an analgesic that could permit athletes to work through injuries and pain induced by training fatigue.
13. Conclusion
Recent advances in understanding the endogenous cannabinoid system demonstrate its important role in many critical functions that could positively affect sports performance. This fact, together with the detrimental health effects of cannabis and its violation of the spirit of sport, supports the prohibition of cannabis and its analogues.