the mazatecs and mayan's used to do it when they built their pyramids, or even went hunting, what do you think it would do for you when working out? increase one's load/workout capacity?
coca candy?
A couple years ago, a friend from Equador gave me a couple bags of these
innocent looking green square candies, said they have an "active ingredient." Think they are hard to find, don't have them anymore. Tried a couple, got all giddy and stuff for a hour or two, then got a headache, drugs are like that, what goes up, comes down.