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Old 07-12-2011, 02:47 PM   #11
Darryl Shaw
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Re: Lower Fat vs Lower Carb study

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As far back as William Banting it has been known that keto diets are successful because the dieter is able to eat until they are full and do not need to go through the hunger feelings like they do with low fat carb based diets. Obese patients tend to have trouble metabolizing carbs. With keto there is a lack of glucose in the blood stream so the body is forced to metabolize adipose tissue.

So yeah if an obese person can deal with the constant craving for food with the reduced calorie mixed macro nutrient diet then they could possibly lose weight but will always struggle to keep it off. With keto they can always eat until they are full and will see consistent weight loss. The keto diet has proven to be much more sustainable.
A lot of people have become very rich thanks to William Banting and his Letter on Corpulence started the whole low-carb diet industry but we now know that the rapid weight loss seen with low carbohydrate ketogenic diets is due to the depletion of glycogen stores and changes in water balance. It's also been demonstrated in numerous metabolic ward studies that the amount of fat lost on a hypocaloric diet is determined by the extent and duration of the energy deficit not the macronutrient content of the diet and there is no "metabolic advantage" to be had from low-carb/ketogenic diets. Research from the National Weight Control Registry has also shown that most succesful dieters, defined as those who lost at least 30 pounds and maintained a weight loss of at least 30 pounds for one year or more, maintained their weight loss by combining regular exercise with a low fat diet while only 10.8% of participants in the study reported following a low carbohydrate diet.

Persons successful at long-term weight loss and maintenance continue to consume a low-energy, low-fat diet.

A descriptive study of individuals successful at long-term maintenance of substantial weight loss.

Three-Year Weight Change in Successful Weight Losers Who Lost Weight on a Low-Carbohydrate Diet

*All links wfs*

Last edited by Darryl Shaw : 07-12-2011 at 02:58 PM.
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Old 07-12-2011, 03:42 PM   #12
Jordan K Smith
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Re: Lower Fat vs Lower Carb study

Darryl, what do you think about the concept of a lowcarb diet being more protein (lbm) sparing during a deficit because of the switch to relying more on fat rather than glycogen?
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Old 07-12-2011, 07:32 PM   #13
Katherine Derbyshire
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Re: Lower Fat vs Lower Carb study

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Darryl, what do you think about the concept of a lowcarb diet being more protein (lbm) sparing during a deficit because of the switch to relying more on fat rather than glycogen?
The first step toward proving such a concept would be to look at people who *aren't* exercising while they attempt to lose weight. If you are forcing your body to use its muscles, it will be more inclined to keep/build them, regardless of diet.

Katherine
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Old 07-13-2011, 03:58 AM   #14
Darryl Shaw
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Re: Lower Fat vs Lower Carb study

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Originally Posted by Jordan K Smith View Post
Darryl, what do you think about the concept of a lowcarb diet being more protein (lbm) sparing during a deficit because of the switch to relying more on fat rather than glycogen?
A hypocaloric low-carb diet will result in a greater reliance on gluconeogenesis to maintain normal blood glucose levels than would be the case with a high-carb diet so there would be a greater loss of LBM on a low-carb diet when campared with an isocaloric high-carb diet. In practice the difference between the diets would be quite small though so you wouldn't really notice the difference unless the diet went on for a considerable time.

Where you would see a difference between low-carb and high-carb diets is in their effect on work capacity while in a calorie deficit. A low-carb diet would soon compromise glycogen stores and this would limit your ability to exercise at intensities > 60% VO2 max. The inability to maintain a high level of high intensity exercise would reduce the number of calories burned through exercise which would affect the rate of weight loss and, over time, the reduced work capacity would result in the loss of any training adaptions you might have made and this would of course include the loss of LBM. This is why athletes who need to lose weight are advised to reduce their fat intake rather than cut carbs.
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Old 07-13-2011, 07:11 AM   #15
Rob Samuels
 
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Re: Lower Fat vs Lower Carb study

For every study found reporting the benefits of diet X there is an equal amount of evidence for diet Y. I find it funny the arguments and debates that erupt (myself included) over which diet is best, high carb low carb high fat low fat paleo, zone, ornish, blood type etc...

Regardless of what many claim we are all individuals and our bodies respond differently to the things we put in out mouth. I have tried about every diet out there and can say I achieved some results on all of them but maybe not for the reasons they claimed. The one thing which after all this experimentation I discovered, is that for me, all these diets which eliminate certain foods be they grains, meat, fat whatever, are simply not sustainable in the real world. If I want a hot dog I want a nice juicy beef hot dog not some fake soy hot dog, and if I want mashed potatoes, I want some big fluffy russets with lots of butter, not ground up cauliflower. I think it really boils down to the age old addage, "everything in moderation."

Now if you are comfortable eating 3 almonds and a piece of beef jerky everyday and that works for you or if you think eliminating animal products yet having to supplement with B vitimins because of it makes sense well who is anybody to tell you different? At the end of the day its your body you eat how you want. Why are so many people on this board intent on "proving" through articles and books that someone else is eating wrong?

Go have a double protein style cheeseburger or a tofu hotdog whatever floats your boat and dont worry about what everybody else is eating.

Bottom line eat what works for you not what some book or article says should work for you because in a month its all going to change and a new diet guru will be pointing to all the studies that prove, we should really not be eating at all and get everything we need from taking baths in liqued vitamins.
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Old 07-13-2011, 10:56 AM   #16
Jason Martin
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Re: Lower Fat vs Lower Carb study

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A low-carb diet would soon compromise glycogen stores and this would limit your ability to exercise at intensities > 60% VO2 max. .
Yet we consistently have elite level crossfit athletes that eat this way and win. Why is that?
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Old 07-13-2011, 11:45 AM   #17
Katherine Derbyshire
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Re: Lower Fat vs Lower Carb study

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Yet we consistently have elite level crossfit athletes that eat this way and win. Why is that?
Do we? I'm not sure the diets of top crossfitters are all that well known.

Katherine
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Old 07-13-2011, 12:11 PM   #18
Darryl Shaw
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Re: Lower Fat vs Lower Carb study

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Yet we consistently have elite level crossfit athletes that eat this way and win. Why is that?
In the summer of 2008 a young man woke up mid-morning, ate some chicken nuggets then watched tv for a while. That afternoon he set a world record for the 100m.

Sometimes a genetically gifted athlete wins despite not because of their diet.
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Old 07-13-2011, 12:40 PM   #19
Rebecca Roth
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Re: Lower Fat vs Lower Carb study

Interesting that the Whole9 folks just linked in support of this specifically for cfers...
The Case for Higher-Carb Paleo Diets(wfs)

On the same topic -
The Catecholamine Honeymoon (wfs)
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Old 07-13-2011, 12:43 PM   #20
Jason Martin
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Re: Lower Fat vs Lower Carb study

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Originally Posted by Darryl Shaw View Post
In the summer of 2008 a young man woke up mid-morning, ate some chicken nuggets then watched tv for a while. That afternoon he set a world record for the 100m.

Sometimes a genetically gifted athlete wins despite not because of their diet.
Sure.

....Regardless, a low carb/zone/paleo diet is advocated in the CFL1 cert and has been adopted by many many athletes that perform optimally on it. Can you explain why this might be? Or are they all just genetic anomalies?
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