We breath at the same rythm all the time, and we use a "belly" breathing with a rate around 20-22 b/min.
so one breath cycle every 3 seconds? Wow. I can barely get a full exhale in less than 5 seconds!! So i'm curious now, what is your heart rate like?
I think that the only way to improve the 100% is to be around it, to force adaptations in the body.
I'm starting to see your point a bit. This morning I was trying for a new pb today of 4'. here was my warm up attempt.
ventilation | Breath hold
mins sec | mins sec
2' 0" | 1' 0"
2' 15" | 1' 30"
2' 30" | 2' 0"
2' 45" | 2' 30"
3' 0" | 3' 0"
3' 15" | 3' 30"
3' 30" | 4' 0"
Gosh was it quite a struggle but when i hit it i was so proud, considering that 2'45" was my pb about 3 weeks ago. But 7 recovery periods! quite a lot! After i went out for a while and came back i wanted to see if it could hit the mark again with less recovery periods.
ventilation | Breath hold
mins sec | mins sec
2' 30" | 2' 0"
3' 0" | 3' 0"
3' 30" | 4' 0"
I'll have to say that getting to 3' was surprisingly easy and 4' was a little less difficult. I don't feel as 'zoned out' as the first try. So I quess what i'm thinking is if you are hitting your pb daily, it should be easier, and then maybe you should open up your warm up a little so that it looks like this:
ventilation | Breath hold
mins sec | mins sec
4' 30" | 5' 30"
5' 0" | 5' 45"
5' 30" | 6' 0"
or like this
ventilation | Breath hold
mins sec | mins sec
4' 30" | 5' 0"
5' 0" | 5' 30"
5' 30" | 6' 0"
6' 0" | 6' 30/45"
Already within a day i have been able to hit my pb twice, the second time with less recovery periods. So i'd like to imagine the progession forward is like a catapillar which contracts and expands yet continues forward. possibly another way to work your body around the 90-100% marker is to slowly reduce the ventilation periods.
So instead of doig 60-80% daily and doing 90-100% once in a while, one should strive to do what is necessary to achieve 90-100% each and every time. sooner or later your pb will get more comfortable and then you can push a little further and set your new pb.
hope that made some sense,
Mark. k