How long?

[nhojmabon]

Hello everyone,
My name is John and I'm new to the forums and freediving.
I've been lurking around the forums for quite a while now and I have become quite curious over some things.

I can hold my breathe for 1:10 without too much problem, but I am scared of going further. (normal breathing, static dry and water is pretty much the same). I can also swim 30m dynamic, through normal breathing and normal breath hold.
I have seen some charts showing SAO2 vs time, and I have noticed that their SAO2 levels don't fall much at all until 2-3 minutes in. A chart showing Walrus' change in SAO2 was very intersting as it took so long to drop, he lasted 7 minutes I think.

I was wondering if anyone could take a guess at how long I could safely stay under water. By "safely", I realise that there is always a risk. But.... you kind of get what I mean.
If anyone could help me, I'd like to know how long the average athletic person could hold their breathe before their SAO2 drops below 95%, 90% and 85%?
I am a 17 years old, do a LOT of cardiovascular fitness and weights etc.

Also, what happens if I hold my breathe for so long I lose consciousness while doing a dry static. Will my brain kick-start my automatic breathing? Not that I will try and hold my breath for that long, but I'm just curious.

Thankyou for your time
Johnno

 

[DeepThought]

Welcoem aboard.
It is ppO2 that keeps you concsious, not saO2. This will not keep you safe. To learn more on blood O2 run a search on blood O2 dissociation curve.

It is presumed that dry statics are safe and that you will start breathing after a dry BO.

 

[Bill]

John
To answer the other part of your question, you only need to look at your own numbers. If you train equally in the two (static and dynamic), the ratio of 2.5 or 3/1 of time will hold fairly close. My ratio is about 4/1 because I train far more for static. In Wal's case, he trained for both and the numbers are close to 3/1 (if you allow for his 12 meter kick at each turn). Most divers do not like static training and end up in the 2.5/1 range. They really are two different sports.
Diving by the numbers can be very dangerous. Trying for the max is too. All of the teachers that I'm familiar with recommend training at well under max and small steady increases, preferably with a buddy that is better or more experienced than you.

 

[..Sam..]

I'm not answering your question just asking you one. Where abouts in Australia are you? A few mates and myself are in Melbourne and we're doing a fair bit of freediving in a safe environment. Your more than welcome to join us if your in the area.

Cheers, Sam.

 

[nhojmabon]

Hi Sam, I live in a small town in nsw, moving to Albury NSW sometime soon. Thanks for the offer, I'm quite interested in freediving and would love to join.... if only I lived in melbourne

As a side note: I've been doing quite a lot more research into breath-holding/freediving and have been doing lot of practice, this is a really interesting and addictive sport! I wouldn't mind living a spearo or freediver life
Yesterday I reached a new pb of 2:30. A few weeks ago I thought if I held my breath for a minute I was risking brain damage and would fall unconscious. This forum has certainly changed my perspective.
I can see that my question is pretty hard to answer and it would vary quite a bit from person to person so thats ok my question doesn't need to be answered.

Thanks for the helpful posts guys,
John

 

[..Sam..]

Shame your not in Melbourne but it is nice to see more Australian free divers, we really need a bigger freediving industry in Australia, if your looking for people to dive with, there is a freediving club in Sydney. Could be a bit far but still might be worth a shot. Or try Australian Freediving Community - Fanatical about Freediving in Australia, or Google freediving Australia or AIDA Australia and you may find some local groups. All the best in your diving and keep up the good work. If you ever need help or have a question feel free to ask. You've defiantly come to the best place for information on freediving.

Cheers, Sam.

 

[octpora]

"A few weeks ago I thought if I held my breath for a minute I was risking brain damage and would fall unconscious. This forum has certainly changed my perspective."
:friday and:ko and maybe even this :chatup can cause brain damage. Deeperblue forums have never been clinically shown to inhibit the onset of brain damage but my lead to the afore mentioned activity and/or circumstances.