when and why does BO occur?

[par2005]

Hello there,


I am really new to freediving, and we don't have much education about this new sport here, in Lithuania, so one of the best sources to learn from, is in no doubt, this forum.

I am sorry if this question was already discussed. I really tried hard searching all the forum and reading all the posts (LOTS OF THEM!).. but that's why the beginners section is for.. i guess

In general i have a clue, what happens when the freediver stops his breath, but just in general. So:

1. The o2 quantity lowers..
2. the co2 quantity rises..
3. depending on person, mammalian reflex kicks in..(heart rate, blood and so on..)

The question is - are there exact or average numbers, on when BO occur?
for example, when o2 goes lower than this or that percent..

Its not clear to me, what freedivers train - how to lower the consumption of o2, or how to survive low o2, and not blackout.. or maybe both?

..because if now in my static pb at ~5min i was near my dry BO, when i will be training further, is it the o2 consumption i have to lower to reach better times?

Sorry if it looks kinda complicated.. Thanks!

 

[bluecape]

Hi Buddy

Search under SWB, and you will find a thread about it by Sebastian Murat!

I guess the biggest danger of BO is that it's not an exact science, it strikes without warning, and appears to have no rules with regard to patterns. it could be brought on by biorythyms, diet, sleep patterns, training, mental state, etc etc as far as I can see, all which differ??

Be safe.

jeff