I find this thread intresting since I once thought I would never pass 6 miuntes in static. Since then I have done that a few times and I find it intresting to try to understand the difference between a 5.30 breathhold and a 6.30 breathhold. It seems to be such tiny details that makes the difference - for the reader of this post I offer my latest breathhold that was monitored by a scientist. Thanks to that I got a lot of data of which I only understand a third - some of you might be able to interpret and use this data.
http://www.fridykning.se/freediving/features/7min.html
Sebastian /Sweden