[ay]

Thank you! The second link was the missing one for me ;-)

I did a breath work session once out of curiosity, but it was so much voodoo talk and so much obvious exploitative power dynamics from the “guru” after the session, I could barely hold my disgust. (But yeah, I got both tingling and cramps on top of that)

Deliberately reducing the oxygen to the brain sounds like a not so good plan to me, regardless of what it is caused by…

I recently acquired the pulse oximeter that can be worn during sleep, and the correlation of oxygen levels during the night with how I feel in the morning is seemingly pretty strong.