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A Question on Diet...

Thread Status: Hello , There was no answer in this thread for more than 60 days.
It can take a long time to get an up-to-date response or contact with relevant users.

loopy

Deeper Blue Hypoxyphiliac
Oct 24, 2002
719
51
0
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Hey all,

Just a quick one - I'm looking to see if anyone has noticed any differences in their breath-hold from living on a low sugar/low starch (ie low carb) diet. I know Wal told me once before he tried it, and statics got much harder, but I've been living on about 50g of carbs a day for the last 7 odd weeks, and after getting back into it from a year off, it seems to be easier to push myself.

Anyone else noticed anything like this? Would this just be a by-product of muscle loss? (I'm talking improvements in both static and dynamic)


Cheers,


Brad
 

efattah

Well-Known Member
Mar 2, 2001
3,294
487
173
On a low carb diet, you produce less CO2 per unit O2 consumed, meaning that your contractions may come much later, nearly as if you hyperventilated, making it easier to push it to the max. However, your ultimate time will probably suffer, because of the decreased efficiency of fat-burning vs. carb burning.
 

Bill

Baron of Breathold
Oct 17, 2001
1,805
332
188
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Aloha Loopy

Good to hear from you. Hope that life 'out west' is treating you well.

A few years ago, I overheard a conversation between two guys that have been diving longer than I. They were talking about friends that were lost while diving and dieting. It sounds like Eric has worked out the chemistry involved. Maybe a good time to be extra careful.

Bill
 

loopy

Deeper Blue Hypoxyphiliac
Oct 24, 2002
719
51
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Cheers Eric - that pretty much coincides with what I've experienced

Bill - will do mate, I'm minus a buddy at the moment, so all my trainings dry. Been out of the water for a number of months now (like 10 :() but getting keen to get back in, so starting the training. Well done again on the record :)
 

island_sands

Erection Supervisor ;)
Supporter
Jan 19, 2001
7,998
1,281
418
hmmm i just know that i cut out carbs almost totally and lost 8lbs in two months....
 

DrLindholm

New Member
May 31, 2004
14
1
0
Low carb diet is dangerous when freediving. We recently studied the effect of low carb (glycogen depletion) on apnea. The results were published at the last UHMS meeting and a publication is accepted and will appear in the European Journal of Applied Physiology soon.
The summary was that if you depleat your carbs from diet and exercise, your body will consume oxygen faster during apnea and also the carbon dioxide will accumulate slower. This means that the urge to breath will be delayed, so you dont get the warnings in time to surface. (Which can be interpreted as "easier" to hold your breath since the signals are reduced)

I personally think that this can explain why some accidents among experienced divers or spearfishers. If you go diving for a full day without replenishing carbs during the day you might shift your metabolism and risk a blackout without the normal warning signals. This also explains many cases of LMC and LOC during competitions in apnea where the athletes skipped the breakfast.

Pure Fat metabolism consumes approx 7% more oxygen and produces 30% less CO2 than pure carbohydrate metabolism


Dr Peter Lindholm
 
Last edited:

BennyB

will freedive for beer
Staff member
Forum Mentor
Sep 25, 2004
3,099
559
203
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Hi Dr Lindholm,

It would be great if you could post a link to research when it is published. I was doing the Atkins diet before I got into freediving and was considering it again now. However any research like this could help me with a more informed decision.

Cheers,
Ben
 

naiad

Apnea Carp
Supporter
Oct 11, 2003
2,897
449
138
40
I find that eating lots of carbs (pasta, cereal etc.) several hours before apnea improves my performance.

I could eat breakfast cereals all day..... :p

Lucia
 

Murat

Promethian
Jun 21, 2002
2,982
159
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Hi Dr Lindholm,

First of all welcome to the forum:)

What about high protein moderate carb diet? Like 140-160gr protein daily and smilar amount or little more carb. I am around 80-82kg and regular gym routine:hmm like 4-5 days a week..
 

loopy

Deeper Blue Hypoxyphiliac
Oct 24, 2002
719
51
0
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G'Day Dr Lindholm, and again welcome to the forum!

You mention that skipping breakfast might lead to a carbohydrate depletion by the afternoon, which could reduce breathold times - my question is what kind of time frame are you looking at before these effects kick in? Say I have a heavy gym session, burn up all my glucose stores and then go for a dive, will I be at risk? Dr Atkins mentions that it takes about two days for the body to convert from "glycolisis" to "lipolisis" - does this factor into the equations at all?

Thanks very much for your input - I'd also be interested in seeing a copy of the study when it becomes available :)


Brad
 
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