We had the chance to try out Static Breathhold with pure Oxygen used in the breath. This was the first training after the xmas holidays So I was not well trained. I did one 3 min test dive with no contractions.
We later realized we were missing a valve of the oxygen mask so: it could be I did not even breath pure Oxygen in my breath up. I think I could have pushed even more since I was very "pink" in the face and the lips not blue at all what you would expect after such a long breath hold. The contractions started around 8 minutes (normally they start at around 45min ... and so I could extend my personal best from 7:38 without Oxygen to 12.04 with Oxygen. Which is a really long time. My though was: imagine just sitting on a chair for 12 minutes straight without downing anything will be a task for it self, what to think, or better trying not to thing at all for the most time. Take care everyone try it for your self Your Leander