oh yeah, that was one thing i forgot!...
delaying contractions for as long as possible.... this was really important for me. delaying them not through hyperventilation, but through pure mental control. i found i was able to almost let the extreme hypercapnia 'wash right over me' as if i just didn't care. i used to try to completely accept it and learn not to fight it. the longest i delayed contractions by this approach was around 6'30... that was for my pb. eventually the hypercapnia would always get the better of my feeble mind
and the contractions would start.
i have no doubt that it can be done for much much longer, with training. that was a technique i just played with and never really trained it seriously. having these muscular contractions and being tense and 'fighting' wastes so much O2.
