JoeTPhilly
Contributor
This video may be of interest:
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Thanks for asking the question. I've wondered the same thing and this thread has been pretty good and educational. I sing (took voice lessons, etc.) so that probably helped me quite a bit along the way but I've got a lot more to learn and practice. I guess I'll just have to dive more.I am confused about how using breathing for buoyancy control interacts with breathing deeply to be efficient with air usage.
In my training dives I found that I was eventually able to stay in a relatively still horizontal position, without flapping my arms and legs around. However, when I took a deep breath in, I would go up, and when I breathed out again, I would go down. The only way for me to stop yoyo-ing up and down was to take small breaths in and out. The problem with that, of course is that it's a really inefficient use of air, due to dead space. The advice I see is to take deep breaths in and out (4, 5, 6 seconds each).
Could people help me see what I am missing here? How do I breath in and out deeply, without yoyo-ing up and down?
this whole thread is awesome, I'm in the midst of my ow training and had the same exact thought. I too have decades of singing/woodwind training and felt like I could control my breath very well, first pool class I was able to fin pivot immediately which boosted my confidence, however the bcd control was even more laggy by comparison. but the video above and technical explanation (i'm an engineer too lol) was just what I needed to clarify some of my lingering questions.Thanks for asking the question. I've wondered the same thing and this thread has been pretty good and educational. I sing (took voice lessons, etc.) so that probably helped me quite a bit along the way but I've got a lot more to learn and practice. I guess I'll just have to dive more.
Not exactly. Actually tidal volume varies quite a lot. I recently posted a video on teaching people with big lungs how to dive. It goes further into the issue of Tidal Volume. You might find it helpful.Thanks for all your input everyone. This has been a revelation. Key takeaways are
- Breathing should be normal tidal volume, not anywhere near maximum forced in/out.
- PHASE!!!
Let's consider how to reconcile the requirements of rinsing the lung well and not having much buoyancy.Actually tidal volume varies quite a lot. I recently posted a video on teaching people with big lungs how to dive. It goes further into the issue of Tidal Volume. You might find it helpful.
If you want to get the most O2 out of your air and get rid of the most CO2 when you exhale, you will pause after the inhale, not after the exhale.Let's consider how to reconcile the requirements of rinsing the lung well and not having much buoyancy.
After exhalation, there is always a volume left in the lungs and airways that is diluted by CO2-poor air during inhalation. Let's assume that after inhalation, the concentration of CO2 should only be 50% of the exhaled air.
Diver1 has a minimum residual volume of 1.5 L and a maximum lung capacity of 6 L.
Diver2 has a residual volume of 2 L and a maximum lung volume of 8 L.
If Diver1 now exhales to a volume of 2 L, he must inhale 2 L (for 50% CO2), his total volume will be 4 L.
If he exhale only to 3 L he must inhale 3 L up to 6 L what is his max lung capazity .
Diver2 may exhale to 2,5 liter , inhale 2,5 L to 5 L . When he exhale to 3 L and inhale 3 L ,
he don't reach his full lung capazity of 8 L .
For good lung ventilation and little buoyancy, it is important to exhale well.
A german instructor is promoting a breathing system that he calls "Diving without Lead."
I only know this system from a second hand and I apply it when I am too light at a shallow depth (e.g. deco) . It is : Inhale, exhale, rest, inhale , exhale , rest....................
Here, the diver has exhaled for the longest time, which significantly reduces their average buoyancy.
In order to dive with pleasure exhaled, some practice is required.
For example, I dive in the pool with exhaled distance and inhaled distance,
holding breath while exhaled and inhaled.
To get the most O2 out of your air is never nessesary because even in shallow depth you have more then enought O2 .If you want to get the most O2 out of your air and get rid of the most CO2 when you exhale, you will pause after the inhale, not after the exhale.