I have tested/experimented some too, but it's all not very revealing I guess.
I'm not much into caffeine too, not even in race situations, although I tried it extensively for a while. With endurance stuff, I find it important to know what my body is doing and a stimulant is not exactly helping with that. And I see it as part of training/preparation to get to know what it feels like to have a low batch and what games the mind is playing. I sometimes used Kola nut (it's slower and easier on the stomach for me than the coffee bean), but just to get easier off the couch within a long consistent training stretch and not for running itself.
Also did the keto lifestyle for a while, but what this is and does can be read on the net I guess, although it was quite interesting.
@PrincessDiz Did you get crazy ripped too? I imagine that that is not always desired when female. I have a low body fat percentage by nature, but once eating that way, I got this pre-race-day-look all the time to the point where it got almost scary.
I tried cannabis a couple of times too, with a vaporizer of course and not exactly for performance reasons. Why I would want to dope myself
for training is beyond my understanding anyway. Some light sativa right before a run can really change my mindset and my perception of the whole thing. I run in nature, so that is certainly a factor too, I'm not sure if it would be that pleasant in a city surrounded by cars and stuff. It's really easy to get in a flow state, just letting the scenery fly by, feeling the body so intesely, amazing! One time I got a shitload of insights while running on cannabis; I had to sit down and immediately write them on a piece of paper once I was back home.
Psychedelics can have a strong bodily effect on me too, but that's too unpredictable and I don't take them for sport/training etc. The most impressive and closely related to movement was with LSA, where I 'actually' was floating. No sensation of walking or moving whatsoever, I was just a warm cloud that could be navigated through space by mind alone. Pretty far out, but I wouldn't want to do anything serious in such a state.