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The many Ways of Recovery Breathing.
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- Опубліковано 17 сер 2020
- Hi freedivers and instructors!
This is another short video to explain the details of freediving.
Sorry for the audio that is slightly out of sync, I am still fiddling around with my portable studio setup.
Cheers, Oli
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My name is Oli Christen, I am a freedive instructor trainer for AIDA and PADI Freediver, and an Instructor Trainer Developer for Molchanovs. I am also the original author of the AIDA course manuals and I was awarded for outstanding contributions by PADI Freediver. Currently I am a leading contributor to the Molchanovs Wave Program. I post videos in random intervals, whenever interesting questions come in.
Please send your own questions to: info@freediveflow.com
Find my freedive school on www.freediveflow.com.
This is what I was looking for! Great explanation! Thanks,Oli!
Always happy to help!
Well explained Ollie
Great explanation brother to bring awareness and empowerment to decipher between the recovery breath styles. Providing resistance on exhalation to increase plural pressure on the expiratory phase of the breath cycle is known as PEEP (positive end expiratory pressure) which this practice is very similar to the common practice we do via ventilation to pts to increases po2 and lung recruitment. As you said too much bearing down pressure in a hook breathe can decrease your preload to the heart(refer to frank starling law of output) this less output; additionally it can stimulate your baroreceptors in the internal carotid’s and aorta causing further bradycardia to further reduced output in a moment where a free diver needs good flow of blood through lungs to rectify the hypercarbic hypoxic state.
Thanks for the clarification Jeff!
Again this is all theoretical. @Oli Christen-Drew. I understand you are one of the greatest contributors to the freediving education but i was just wondering about actual experiments that were done. This is something we teach to students so i wonder if there was any experimental evidence to back up what we teach.
I agree with both of you thank you for the detailed explanation @jeff sundin. But i believe the hook breathing is derived from the techniques pilots use to prevent blackout from the effects of g forces experienced during aerial maneuvers. The reasons why i don't recommend it for freediving is because we don't necessarily get blood forcibly pulled from the brain by g forces in freediving. But then i think there might be an error because hook breathing is meant to increase preload not decrease it. And i believe these are proved by experiments on pilot training.
@@barnybee7505 thanks for your input! Alexey Molchanov has actually conducted measurements for various recovery breathing techniques, I will ask to share these results with us.
@@barnybee7505 I can only guess how different the situations are: A hypoxic freediver does not have a problem with low blood flow towards the brain (like a fighter pilot experiencing high g), freedivers on the edge deal with low oxygenation while the blood flow is normal, or due to cerebral vasodilation even enhanced. This is why I never really got the fighter pilot explanation for hook breathing.
As always great explanation (Y)
Thanks a lot!
Great! 😊
Thank you! Cheers!
I was taught a different method, exhale a little inhale little more than the exhale no pressure just a hold and repeat 3 times then exhale more and inhale a little with a pauze breathe hold no pressure so that at the end of 3 repetitions your at neutral lungs then a good breath in through the nose and gentley out through the mouth to neutral lungs... I'm OK.
Hi, you mention the initial step as being an inhalation, however how do you do this if you already have full lungs. When resurfacing, you need to first enhale before starting the recovery breath inhalation. Do you exhale fully or partially as the initial step? Thanks
Thanks for pointing this out, I missed mentioning that, indeed. After surfacing, first comes a passive exhale! "Passive" means you open the airways and let the air flow out. This exhale will end somewhere around half-full (FRC, for those who know this term already), so it is a partial exhalation.
@@OliChristenDrew Great, thank you!
I understand the theory but is there any science based evidence that this is true and is effective in preventing a black out or any evidence that it is more effective in raising the oxygen?
Hi Barny. As Jeff explains below (and he is much more qualified to do so than me), I think it clears up things even more.