Personally, I took on a simple approach that I learned from a few sources including this site; HYOH.
It seems to be overused and underappreciated, but until I learned what it actually meant, I would worry about stuff like performance enhancing drugs, distance, comparative analysis, etc. What it really means is freedom; freedom from competition; Freedom from all the social pressures I encounter daily.
IMHO, those taking the stuff are not truly free from social pressures, hence not fully taking in the true essence that is hiking/backpacking. I have no opinion if it is a good or bad thing to take performance enhancing drugs, per-se, and will not judge those that do. I believe that one is supposed to be tired after a long day on the trail and that a zero day should feel like a blessing instead of a hindrance.