Some of my friends like to smoke (using both traditional methods and vaporizers that produce no "smoke") or eat edibles before rides, they say it makes it more enjoyable. I always wonder if it affects their performance, insofar as they fatigue faster, have less endurance, make less power, etc.
They claim it doesn't. A few have said they are actually better while medicated, for various reasons, like any pain they may be having is numbed or they feel that they can just crank away forever. I'm not so sure. I usually say "well, it probably just feels that way" - I doubt there is any benefit, but I could be wrong.
Furthermore, for an experienced rider, could it be said that it is dangerous to medicate and ride?
Have there been any studies done or any empirical research that points to a decline in performance and/or increased safety risk? e.g. getting hit by a car.