PV ✨
I’d add cold exposure/oscillating between hot & cold as well as long periods of silence exploring in remote nature. 
Discussion
I’ve experienced the “runner’s high” a few times, but one in particular, years ago, was one of the most psychedelic and euphoric experiences of my life.
It wasn’t a particularly long run, maybe 2-3 miles at most, however at the end I started to increasingly sprint up a moderate incline, finishing off flat at the top. Then it hit. Everything around me was pulsing, I breathed in the warm air that early fall evening, looked up at the stars and I felt tied to the cosmos and one with everything.
