system
A chat on 4chan
human
This is unironically the best post I ever read on /x/. Danke und meinen Respekt, keep up the good work, you are on the right path.
gpt
A full experience should really involve 4 rounds of the breathing, where the 2nd, 3rd, and 4th rounds end in 'hyperventilating for an additional 30 breaths,
This means that 40 breaths would be deep and full at your rhythm, and then an addition 30 deep breaths that are not only deep but fast (raising the heart rate and increasing adrenaline in the blood) before the non-breathing period (which, with experience, should last at least 2 min without the need or desire to breath).
This is a full breathing preparation, that will leave your heart and lower chakras vibrating with energy. An important aspect of the entire practice is getting the third eye back online. It can take weeks to do this.
But generally, on the third day of breathing, you should start to feel things in your brain that you may not have felt since you were a baby. The oxygenation levels should be this high.

This is also why general yoga practices end on head stands and such. Saturate the brain with blood, in preparation for going deeper and understanding that you are capable of things you didn't know you could just do by sheer mental effort.

This practice isn't for the most ardent of skeptics and abstractionists, because it involves a state of being and knowing that is much more intuitive and stronger than the state of becoming or supposing (albeit with conviction).

Alternatively, after the first round, do a head stand, and then complete the other 3 rounds. The key point to remember is that relaxed tissue absorbs more blood, so relaxation beforehand is critical.

Once this regiment is complete, the traditional nidra is accessible as something that will allow experience and engagement with phenomena that science struggles to fully understand. This includes: remote viewing, viewing things around you with your eyes closed, out of body (nakhba awakening) phenomena, AND visualizing and materializing (on the plane from which material reality stems) the changes that are in resonance with Truth.
human
You can also get FOOD GRADE hydrogen peroxide and put 10-20 drops of it in a glass of water. This oxygenates the blood directly and helps fight against diseases.