I've tried a few times to get into weightlifting. I can never stick with it, though. It's not necessarily a self-discipline thing, because I've run thousands of miles over the past decade. When you run, you get outside, you go somewhere, you see and feel different things. There's a race ecosystem that encourages you to get in when you can barely run a mile without stopping and allows you to push yourself as much as y…
Thompson says that running has worked as a powerful medicine for the mind, and that, much like the analyst’s couch, the running trail has become his therapeutic space, allowing his traumatic memories to be processed in a safer way. Ultra runners, he explains, experience physiological changes in the brain, entering trance-like states that alter perception and enhance free movement of thoughts and memories.
https://www.kcrw.com/culture/shows/life-examined/jm-thompson...
Not a runner myself but found it pretty interesting. Goes a bit beyond the usual "runner's high" stuff. I imagine there are comparable effects across physical activities.