A simple question of FRC/Exhale Diving

[ncunuclear718]

I read some "Long" threads and articles about this topics
but I don't know the detail step of traning.
Please tell me the way step by step.



Another question:
Got "diving response" by High CO2 level and diving without inhale
how your body got oxygen?
I cannot understand how this technique improve limitions of time and depth.

Please tell me where I wrong, thank you.

 

[cp1204]

To your first question I can't answer, bacause I don't know myself.

Another question:
Got "diving response" by High CO2 level and diving without inhale
how your body got oxygen?
I cannot understand how this technique improve limitions of time and depth.

You will have in fact less oxygen in your lungs and, meybe, in blood when you dive FRC, but because of early dive responce your body will use it more efficiently.

 

[efattah]

Think of it this way.

Are bigger lungs better?

Imagine if you had 100L lungs. That is 100kg of buoyancy. How would you get below the surface? There is no way you can fight 100kg of buoyancy. You would need an 80kg weight belt at least.

With an 80kg weight belt, you would reach the bottom at 100m and your lungs would be only 10L in size; now you have 70kg of negative buoyancy, and you can NEVER swim up against 70kg of negative buoyancy.

So, bigger lungs are not better. So, if bigger lungs are not necessarily better, then what is the ideal lung volume? 5L? 8L? 15L? 85L?

On an FRC dive you don't spend any energy descending; by the time you start ascending the blood shift is so strong that almost no blood flows into your legs.

On an inhale dive, you spend tons of energy to get down, and at that point blood is still flowing into your legs...

The amount of oxygen you start with is not important. All that matters is how much oxygen you CONSUME during the dive.

Dive time = TOTAL OXYGEN / [Rate of consumption]

 

[ncunuclear718]

Think of it this way.

Are bigger lungs better?

Imagine if you had 100L lungs. That is 100kg of buoyancy. How would you get below the surface? There is no way you can fight 100kg of buoyancy. You would need an 80kg weight belt at least.

With an 80kg weight belt, you would reach the bottom at 100m and your lungs would be only 10L in size; now you have 70kg of negative buoyancy, and you can NEVER swim up against 70kg of negative buoyancy.

So, bigger lungs are not better. So, if bigger lungs are not necessarily better, then what is the ideal lung volume? 5L? 8L? 15L? 85L?

On an FRC dive you don't spend any energy descending; by the time you start ascending the blood shift is so strong that almost no blood flows into your legs.

On an inhale dive, you spend tons of energy to get down, and at that point blood is still flowing into your legs...

The amount of oxygen you start with is not important. All that matters is how much oxygen you CONSUME during the dive.

Dive time = TOTAL OXYGEN / [Rate of consumption]

Thank you for your answer. I got something from you.
But I still have a first question
How to practice this technique ? How to induce the "dive response"？
I living in Taiwan. So I cannot join the course about this.
Please tell me @_@

 

[ncunuclear718]

I try to hold my breathl and very short interval between breath-hold. try
to got Higher CO2 level.

My purpose is induce the "dive response", and my "meter" is heart rate.
But I fail. I never got low heart rate.Even my heart rate is faster sometimes.

 

[cdavis]

Hi Ncu,

Not my area, but from numerous posts on this forum, some diver's heart rate doesn't fall that much and they still get good results. I'm in that group.

If you want to induce a reasonably strong dive reflex in the pool, try doing negatives, exhale all the way and go to 3 or 4 meters. Don't stay more than a few seconds. Five or 6 of those should give a pretty strong blood shift. You can practive frc diving in the pool by passive exhale, static till the first contraction, then a dynamic as far as feels good. Do some searching of the forums on both of these techniques as you can hurt yourself with negatives. Of course, a buddy is required for this stuff.

Good luck

Connor

 

[ncunuclear718]

Thank you cdavis.
You help me a lot.

I will try reverse pack my lung and down to bottom of pool.



ps: Sorry for my poor English

 

[immerlustig]

hi nuclear, a word of caution, if i may:

quote: "I read some "Long" threads and articles about this topics
but I don't know the detail step of training."

as long as you do not understand what you are about to do, how you should do it, the possible risks you expose yourself to, i would strongly encourage you to not (quote "reverse pack and go to the bottom of the pool."

make sure you do understand what you are about to do in order to avoid serious injury!

i suggest you read those posts and threads again until you do understand and then you start off easy with exhale diving. being untrained and not informed is a very bad combination.

please be careful and sensible.

regards,

roland

 

[cdavis]

Slow down Ncu, I meant it when I said you can hurt yourself. Roland is right on, reverse packing with negatives can do bad things to you. Understanding what you are doing and going very slowly is required. Further, reverse packing isn't required to get a good blood shift.

Connor

 

[ncunuclear718]

Thank your cautions.

My dnf without fins is 50m in pool but I am disappointed
Because I cannot push my limit during half years.
and my static breath hold time (4min10sec) have the same problem.

!!!Now!!!
I need some new train , some effectively train to improve my limit.
Before I post this question
I have search on this site and read some "Long" thread .That thread
is too long and too many idea from different people.

I just want to know
"How the FRC technique work?" and "How to practice this technique?"

 

[immerlustig]

nuclear, i sent you a pm.

roland

 

[Apnea Boy]

I just want to say that efattah gave a very good answer
:wave