Generally if you (singular) drink coffee, you (singular) will feel awful. The same cannot be applied broadly to everyone. Neither can my experience. This is why broad studies are always needed.
That said, I am trying to learn to be more Zen about running, especially as I'm transitioning to marathon-and-ultra distances. I even run with my mala for my long runs these days to keep myself mentally calm and collected. This came as a result of reading both Zen Mind, Beginner's Mind and Barefoot Running.
I still love the rush of pushing through shorter runs in the ways I described above, though!
The key elements in human thinking are not numbers but labels of fuzzy sets. -- L. Zadeh