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Old 10-05-2013, 03:55 AM   #81
Michael Dries
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Re: What can low-carb (ketosis) do for you?

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Originally Posted by Larry Bruce View Post
Increased sugar consumption increases uric acid concentrations, but so does consumption of many other foods, including meat, by comparable amounts.

http://www.ncbi.nlm.nih.gov/pubmed/15641075
http://www.ncbi.nlm.nih.gov/pubmed/15593346
http://www.ncbi.nlm.nih.gov/pubmed/19375714

Snap!!

A balanced , largely whole foods (Mediterranean) diet can largely mitigate this:

http://biomedgerontology.oxfordjourn...na.glt028.full

From the first link " The total protein intake was not associated with the serum uric acid level in multivariate analyses (P = 0.74 for trend)."

Doesn't that mean that protein was not the reason for the increased uric acid levels? Maybe the "meat" eaters where eating other things along with the meat to increase uric acid? Say a hamburger and soda from mcdonalds? Or am I reading that incorrectly.
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Old 10-05-2013, 04:53 PM   #82
Larry Bruce
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Re: What can low-carb (ketosis) do for you?

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Originally Posted by Michael Dries View Post
From the first link " The total protein intake was not associated with the serum uric acid level in multivariate analyses (P = 0.74 for trend)."

Doesn't that mean that protein was not the reason for the increased uric acid levels? Maybe the "meat" eaters where eating other things along with the meat to increase uric acid? Say a hamburger and soda from mcdonalds? Or am I reading that incorrectly.
Right, total protein consumption isn't related to uric acid levels going up or down. They are correcting for that stuff like soda and isolating on meat.
Certain things drive it down as well, like dairy apparently.

Same issue with studies showing rises from sugar. No one eats just sugar. Or fruit.

Unless you have bloodwork results you won't know (and that's just at 1 point in time).
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Old 10-08-2013, 02:11 PM   #83
Paulo Santos
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Re: What can low-carb (ketosis) do for you?

I think I was in ketosis on Sunday. I had 113 gr of protein.
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Old 09-11-2015, 11:59 PM   #84
Dare Vodusek
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Re: What can low-carb (ketosis) do for you?

Interesting study about fat adaptation and athletic performance:

http://bjsm.bmj.com/content/48/14/1077

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The work of Volek and colleagues establishes that chronic adaptation to a high-fat low-carbohydrate diet induces very high rates of fat oxidation during exercise (up to 1.5 g/min)—sufficient for most exercisers in most forms of exercise—without the need for added carbohydrate. Thus fat, including ketone bodies, appears to be the ideal fuel for most exercise—it is abundant, does not need replacement or supplementation during exercise, and can fuel the forms of exercise in which most participate.
Now I wonder; what is 1.5g/min fat oxidation compared to CHO oxidation, is it enough for something like a heavy metcon?
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Old 09-12-2015, 01:15 AM   #85
Dare Vodusek
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Re: What can low-carb (ketosis) do for you?

I think I've found an answer; thereby providing 56 kJ/min during prolonged exercise. The remaining energy would comfortably be covered by the oxidation of blood lactate, ketone bodies and glucose derived from gluconeogenesis

So lets assume that is 15kcal per minute.

Studies have shown that high intensity workouts like the workouts on the site and in the 12 Minute Athlete app can burn upwards of 12 to 22 calories per minute.

So NO, fat oxidation alone is not enough for heavy HIIT, but it is enough for something like a thriatlone or similar.

Unless there is even further cell adaptation possible, resulting even higher fat oxidation output? Maybe.

But for an amateur CFer it is pretty safe to say fat oxidation is enough, considering other health benefits a nutritional ketosis brings to the table.
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Old 09-12-2015, 11:21 AM   #86
Darryl Shaw
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Re: What can low-carb (ketosis) do for you?

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Originally Posted by Dare Vodusek View Post
Interesting study about fat adaptation and athletic performance:

http://bjsm.bmj.com/content/48/14/1077
That's not a study it's an opinion piece, and as I'm sure you know having read the full text, it does not provide any evidence that low-carbohydrate diets are superior in any way to conventional high-carbohydrate diets under real world conditions.

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Originally Posted by Dare Vodusek View Post
So NO, fat oxidation alone is not enough for heavy HIIT, but it is enough for something like a thriatlone or similar.
Sure, providing you don't mind being dropped on the hills and losing in every sprint finish.

''Fat adaptation'' for athletic performance: the nail in the coffin?
Louise M. Burke and Bente Kiens; J Appl Physiol 100:7-8, 2006.


Substrate utilization during exercise in active people.
Edward F Coyle. Am J Clin Nutr 1995;61(suppl):968S-79S.


*All links wfs*
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Old 11-10-2015, 11:01 AM   #87
Dare Vodusek
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Re: What can low-carb (ketosis) do for you?

http://www.metabolismjournal.com/art...abstract?cc=y= WFS

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Compared to highly-trained ultra-endurance athletes consuming a HC diet, long-term keto-adaptation results in extraordinarily high rates of fat oxidation, whereas muscle glycogen utilization and repletion patterns during and after a 3 hr run are similar.
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Old 11-10-2015, 01:36 PM   #88
Darryl Shaw
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Re: What can low-carb (ketosis) do for you?

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Yet another low-carb study telling us something we already knew; that low-carb/ketogenic diets result in increased fat oxidation without compromising submaximal endurance performance.

Nobody cares because out in the real world of competition endurance athletes on low-carb diets will still get dropped on the hills and get their a$$es kicked in every sprint finish by athletes on high-carb diets.

Last edited by Darryl Shaw : 11-10-2015 at 01:49 PM.
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Old 11-10-2015, 11:24 PM   #89
Dare Vodusek
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Re: What can low-carb (ketosis) do for you?

Tell me something Darryl; how can one tell if performance is hindered by too low diet carb intake or its just due to poor conditioning training?
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Old 11-11-2015, 01:24 PM   #90
Darryl Shaw
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Re: What can low-carb (ketosis) do for you?

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Tell me something Darryl; how can one tell if performance is hindered by too low diet carb intake or its just due to poor conditioning training?
By doing a little self-experimentation. Eat more carbs - do you perform better? If yes, there's your answer. If no, test the other hypothesis. Or do it the other way round and change your training programme first.
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