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Comparing FRC maximum depth versus Static then swim in the pool

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ktreloar

New Member
Aug 3, 2008
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Hey crew,

Just gotta a couple of quick questions, currently atm i dont have access to water deeper then 30m, i was just curious if anyone training in the pool on frc (Static then dynamic) has found a way to gauge how deep they are capable of going? Currently my pool dives are around 1:30 static then a 1:30 Dynamic (Length usually around 75-80m i train wearing a cheap 3mm wetsuit to simulate a fair bit of drag).

Cheers guys looking forward to hearing from you.

Regards

Kyle Treloar
 
I think its hard to gauge depth capability in a pool by going horizontally. IMHO, depth is not realized by swimming sideways, but adaptation to many things, like pressure, equalization, mental calmness at depth etc. You have access to 30m of water, maybe dive that 30m on FRC to simulate a MUCH greater depth and much more realistically simulate true depth, that is, if depth is your goal.

Just my 2 cents.
 
Hi Kyle

Yup, breathold is hardly gonna be the limiting factor in FRC depth dive, rather chest relaxation and flexibility and so on as Josh writes, but I know from your other FRC threat, that you already know everything about this ;-)
I go 100m in the pool on FRC introduced by a 45-60 sec static (first good contraction), but only just got to 20m in depth, which was close to the squeeze danger zone for me. Well, for you 30m depth FRC is not much apparently; for me that is very, very deep. Hope you can gauge something from that? (and that you conclude that I will eventually be able to go much deeper) rofl

Very best regards
H!
 
Doing FRC static + dynamic in the pool actually simulates quite accurately a real FRC dive in terms of apnea capacity. Obviously equalizing, chest squeeze, psychology are not simulated.

My best in the pool was 1'15" FRC static + 90m dynamic sprint (25m pool). However my average was more like 1'15" static + 80m dynamic sprint (25m pool).

In the ocean my best was 72.1m FRC which happened when I was slightly sick. I think I could get near 80m in perfect conditions. Which is very similar to the pool. So maybe cutting some meters off the pool distance gives a guestimate.

The main thing is that you have to do the pool dynamic as a sprint. If you do it slowly (kick/glide), it will not be accurate and you will get way more distance in the pool.
 
Hi Eric

Thanks for joining :) Dare I ask what was the greatest challenge in that heftig deep FRC dive?
Indeed kick'n'glide is how I'm going; will definitely try the sprint version on monday.

Very best regards
H!
 
But I'd like to add, that for me at least the FRC DYN (with kick'n'glide) is a very rewarding discipline in it's own right, not a mere traning for something else :)

Very best regards
H!
 
Hey guys thanks for feed back,

hey eric hows it going? congrats on your 100m dive.

hey herup, you hit the nail right on the head there. Frc max depth seems to be limited by chest flexibility and overall adaption to pressure. What i have noticed that makes a huge difference is how fast you travel in your descent, when im travelling faster then 1 m/s i really do feel the pressure. But if i go say 0.8 m/s the pressure felt is no where near as rough. Deepest i have been so far is 28m but that was nearly 8 months ago and back then i was only able to do bounces to that depth. Now several months later i can do comfortable dives to 25-27m pulling out jumbo western rock lobster :) (dive times to 2.00mins). I have also noticed that my dive response is steadily getting stronger and stronger.

As for pool training i stick mostly to static hold then dynamic swim training. By wearing a surfsuit the drag is quite strong and just to get myself moving im exerting about 70-80% so not far from a sprint. Also being weighted to sink to the bottom of pool means i have zero glide. During the dynamic stage of the swim my legs usually start to fail at about 30m into the dynamic. Dont have a monofin so im using bi fins at the moment.

Just a quick question eric do you do any specific training to build up your lactic acid tolerance in your legs? Im finding that the leg burn is factor that is really holding me back.

Cheers guys sorry for the long thread, couldnt stop myself :blackeye

Kyle Treloar
 
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Reactions: Herup
Hi again guys

One week late I got around to the static sprints. Quite a new experience I must say: At the 50m turn (25m pool) I was quite convinced that 100 was going to be reasonable within reach, but around 60 the cockiness curve dropped exponentially and on both my two attempts, I went up at the 75m wall, but after two breaths completely fresh and clear (as usual on FRC).
Gotta try again and see what happens on the other side of the 75m wall (yes I know what happens there: Concrete, iron and sand...:blackeye ).

Very best regards
H!
 
FRC VS TLC Stealing this thread because it's a coherent question in this thread!

How can you say the the ratio is between this two diving styles in depth?

Can you compare the two divingstyles in like the pressure on your lungs trachea and equalization difficulty? It's probobly best to go with a noseclip only and a mask only comparison table that goes from like 20 meters to n meters:

Mask table:

FRC TLC
20m ??m
30m ??m
40m ??m
...m ??m
n m ??m

Noseclip table :

FRC TLC
20m ??m
30m ??m
40m ??m
...m ??m
n m ??m
 
Hi Shark109

Please see this wiki:
[ame=http://en.wikipedia.org/wiki/Functional_residual_capacity]Functional residual capacity - Wikipedia, the free encyclopedia[/ame] :)

There are some good threads on the forum describing what FRC diving is too.

Very best regards
H!
 
the pressure in theory, if FRC is 50% of TLC:

FRC TLC
10m 30m
20m 50m
30m 70m
40m 90m
50m 110m
 
yeah, the numbers look pretty crazy. Just remember that is theory. The real world of exhale, aka frc, aka 1/2 lung, DR diving,etc is all over the place as is each individuals frc volume. For example, I'm diving past 30 m exhale, around 55 % of full lung, but could not possibly get anywhere near 50 m diving full lung.

Connor
 
yes and no.

I'm diving pretty much exclusively exhale, so diving full lung doesn't feel right anymore, feels down right unpleasant. On the only time I've tried depth on full lung recently, I could only just get past my exhale depth, less than my old full lung PB. Felt like being stopped by pressure, but probably wasn't. With a modest amount of practice, I could probably get past 40 m full lung, but I'm more likely to get there first on exhale. Pretty sure 50 m full lung is out of reach for pressure reasons, if nothing else.

Connor
 
Last edited:
hey guys,

hmm it seems to be really dependent on chest flexibility, on inhale you are slightly over inflated if you are used of diving frc. However since diving on frc will help reduce residual volume, diving deeper on Inhale shouldnt be that far out of the question. Hmm on another note i have been back doing some inhale dives, and was shocked when i did an inhale dive to around 8-9m and had no contractions for close to 3 mins ended up bailing the dive at 3:42min only because i was in unknown territory. This dive wouldnt have been possible if wasnt training frc.

Hey cdavis hows your training going mate?

Cheers

Kyle treloar
 
For pool static/swim a drouge is a usefull tool to help emulate the accent of a dive by minimising nearly all glide and making the distance alot harder. I used to wear a strap around my waist and at the back some bungy cord conected to a small drouge
Lalizas-Standard-Drogue-medium.jpg
 
Watts, my hat is off to you. No doubt that is a wonderful tool, but what killer!
You sure you don't have some sado-masochistic tendencies??

Ktrealor, I've been seeing some of the same stuff. Makes me real curious but I haven't pursued it yet. Going back briefly to full lung on working dives and sometimes the body seems to stay in exhale mode. Could it be that using exhale extensively puts the whole system on a new track that will stay that way long term when you go back to inhale??? Maybe its just carrying over the relaxation we learn? This needs more exploration.

Connor
 
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