In the occult community altered states of consciousness are something we regularly pursue in order to affect consciousness on an ongoing basis after a return to baseline. The sort of breathwork talked about in this article (tummo/bellows breath) are big parts of a lot of people's practices, myself included. We also do physical ordeals, flow states, and psychoactive drugs in efforts to take manual control of our perceptions of things. Personally, I meditate for about 20 minutes, then lift heavy weights or do medium-distance high intensity cardio (20-30 minutes of going as hard as I can) then smoke marijuana, then play hand drums and hyperventilate in an effort to induce a ritual mindset, then use mantras and sigils to try to create a mindset that's more conducive to my goals. I can't say empirically that it works, of course, but anecdotally before I started doing this I was a 30 year old obese, hopeless college drop-out pillhead living in my childhood bedroom and now I'm a 40 year old married homeowner full stack engineer with 10 years off pills who can benchpress his dad and I've learned to play the banjo and the drums in the mean time. All of those good things I've listed came to me through tons of mundane effort, smart decisions and good luck but also at least correlated with me using the ritual structure I outlined above to choose them as goals to focus on and rewrite myself into the kind of person who picks goals, focuses on them and completes them.