Quote:slowly start increasing your oxygen levels in your body (look up Wim Hof if you are unfamiliar with this)
With the Wim Hof tek actually O2 levels decrease.
The body regulates blood CO2 levels not O2 levels. So by doing the deep breathing you make your CO2 levels very low, then when you hold your breath, you can hold it therefore longer, as it needs longer to reach a critical CO2 concentration which will force you to breathe again. During this time O2 levels drop and drop, and so you can get to lower O2 levels, than you usually could, just by holding your breath.
Also usually you always get a blood O2 saturation of basically (almost) 100%, already with normal breathing. So deep breathing increases O2 levels only slightly. Even if you would then inhale pure oxygen, that saturation wouldn't significantly change anymore, as you only have that much erythrocytes. But the oxygen blood plasma concentration can change with changing the oxygen partial pressure. E.g this is used to cure some illnesses (hyperbaric oxygen therapy). But even there, where you have manifold higher O2 plasma levels, you don't get high from it.
E.g from a study about the Wim Hof tek:
Quote:A significant decrease in oxygen saturation was observed in the trained group during practicing of the breathing technique
Not saying that the Wim Hof tek is not beneficial, but the state you get in is definitely not due to higher O2 levels.
BTW: I always found it fascinating, that evolution happened in a way, that the body regulates CO2 levels and not O2 levels. IMHO very counterintuitive at first sight (but makes sense at 2nd sight), and also the reason why you don't realize it, when you're dying from too low O2 levels.
I claim not that this is the truth. As this is just what got manifested into my mind at the current position in time on this physical plane. So please feel not offended by anything I say.