Mask breathing

Quote from Dan

What's a Solie mask?

I misspelled it. I use the silicone one, I glue a 1/8 '' thick wet suit foam wrap a round visor to the plastic frame
to keep out light. You don't want one Dan... you'll look like your diving on Magnum PI.:@:D:D:D
Don

well either way if it works it works..

when you descend some air is needed to fill the mask , the problem here is that some people as they ascend let the air escape instead of breathing it back in , which gives you a couple seconds more. now the deeper you go ,, the more air is used into the mask , and as you come up the less you'll have in the lungs if you don't ......recicle.

Why do you guys think it's high in Co2. Wouldn't most of it come from air way instead of lungs???

I think that it's more a "feeling" than anything else. It pushes more air in or down. I was taught to do this thing that you squeeze your stomach while simultaneously humming. It brings air up into your mouth and then you instantaneously push it back down.Bull frog type of deal. You do this over and over a few times. This in-out motion of air prolongs that "I need to breath" sensation. I think the mask thing is similar.
Also, we never truly use 100% of the oxygen available to us in air. air is 20% oxygen of which we exhale 14-16%. That is why CPR works.

I tried the mask breathing the last time out and it works, nothing drastic but enough to feel a little less dicomfort.

Maybe its a combination of this and that your diving has improved significantly:)

There are more tricks, but i'm going to keep them tucked deep under my sleeve!

Dan, I had a very close friend die because he was using a trick he thought he was safe with.
We all have personal limits, What might work for me may kill someone else. I will post my friend story later this
week in a separate thread in Safety.
Cheers, Don

Quote from greekdiver

There are more tricks, but i'm going to keep them tucked deep under my sleeve!

As long as it's tricks and not air tucked in your sleeve, it's all good.:D

Quote from Dan

There's a chance you're joking and there's a chance you're serious. If there are other ways to improve breath hold I'll get there on my own when the time is right, just like I did with the mask breathing, so no big deal. But in my book saying that is not cool. What, you want us to know that you're better? OK greek you're a stud :rolleyes1:

It was a joke Dan. Relax. :laughing3:

Quote from Toledo970

Also, we never truly use 100% of the oxygen available to us in air. air is 20% oxygen of which we exhale 14-16%.

21% O2 of only which 13% makes it to your alveoli of which only 8% max can be used in a perfect lung giving you your %14-16 expiration when breathing. Due to various reasons. Apnea you are holding that 21% and pressure exchanges are depleting it.

Blood has a min of %5 O2 coming in, you work on that 21% reserve with your oxygen consumption rate until it gets close to %5 then your system isn't receiving anymore O2 or working at all for that matter.

Your body uses 1/4 of the available O2 every minute resting, we're pretty relaxed but exerting ourselves on the way down. The air in the mask is put there pretty early in the dive, plus original volume had 21% already in it, so it's close to 21%.

How much air?

Ideal Gas Law --> Pressure*Volume=constant

2 mask fulls at 33fsw
3 masks at 66fsw
4 masks at 99fsw
5 masks at 132fsw

Which is why a low volume mask is good for the way down, but not so good on the way up if you are going depend on that air.

Watch Manuel and ask him. You can learn a lot from him.