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EventsVery low carb performance with Peter Attia
Conventional wisdom says you need to eat lots of carbs to exercise. As you probably know that’s not true. But how low carb can you go — and are there even benefits to performance from eating extremely low carb?
Peter Attia is a medical doctor and an endurance athlete. He’s learned from the world’s biggest experts on keto-adaptation (such as dr Stephen Phinney) and in the last few years he has relentlessly self-experimented.
Here dr Attia shares his insights on very low carb (ketogenic) diets and physical and mental performance.
Peter Attia’s blog: The Eating Academy (highly recommended)
Would recommend Art and Science of Low Csrbohydrate Living, which was mentioned. Available on Kindle.
http://www.amazon.com/The-Science-Carbohydrate-Living-ebook/dp/B005CV...
http://eatingacademy.com/nutrition/what-i-actually-eat
In addition to the other standard resources, you might be interested in hearing of Tim Olsen, a professed low carber who ran and WON the 100 mile "Western States 100-Mile Endurance Run". Shelley over at http://meandmydiabetes.com has a great interview with Dr. Steve Phinney, who was there doing some research with Jeff Volek.
I enjoyed this video interview and after watching I was left wondering about the relationship between ketogenic diets and cognitive function, this is mentioned favourably at the end of the interview but is there any empirical data I wondered?
A quick google revealed this link:
http://anthonycolpo.com/?p=89
Anthony Colpo discusses studies that fail to show a positive benefit of ketogenic diets over other diets, low carb or not, and this failure applies to weight loss as well as cognitive function and affective emotional measures also.
I have a commitment to an evidence based approach to almost everything, certainly to diet and health, I am wondering what other people feel about this kind of counter evidence?
Many thanks for reading this and for any responses,
Peter
I'm going to try and reduce my protein intake to see if that might be the cause of my 5 months plateau...
I find it easy to cut out carbs, but I struggle when it comes to finding the right balance between protein and fat. I seem to be one of those who can't eat that much cheese or other fatty dairy products. So getting enough fat is difficult. I mean just eating pure coconut fat and butter is not fun :D But I'll keep testing and hopefully something will help me get off this annoying plateau.
It dependent about what problem one have.. but blood sugar roller coaster do explain a lot of the good ones.
Some loose weight, other do get normal glucose levels, better lipid levels, better focus and so on.
And some few do get worse level of lab levels or feel awful.. but as a whole, as a diet recomendation to a whole population to avoid fat.. its totaly wrong!
I'd add to his category of people likely to benefit people who have hiked one of the long trails in the United States such as the Appalachian or Pacific Crest and found that their weight ballooned afterwards.
A lot of information and various studies cited in that article. The evidence on mental functioning does seem mixed, and I imagine there is a lot of individual variability, like Peter said. Your questions about counter information are interesting ones. I know that Peter comments on his site that there isn't one right diet for everyone; I think he gives his wife as an example as someone who can eat as she pleases without getting fat.
To use as example regarding mood.
http://archinte.jamanetwork.com/article.aspx?articleid=1108558#ref-io...
Long-term Effects of a Very Low-Carbohydrate Diet and a Low-Fat Diet on Mood and Cognitive Function
Over 1 year, there was a favorable effect of an energy-restricted LF diet compared with an isocaloric LC diet on mood state and affect in overweight and obese individuals. Both diets had similar effects on working memory and speed of processing.
I'm not an expert on the validity of the outcome measures and whether the differences were clinically important, so it's tough to know what to make of that.
The corresponding nutritional study.
Long-term effects of a very-low-carbohydrate weight loss diet compared with an isocaloric low-fat diet after 12 mo
http://www.ajcn.org/content/90/1/23.full.pdf+html
CONCLUSIONS:
Under planned isoenergetic conditions, as expected, both dietary patterns resulted in similar weight loss and changes in body composition. The LC diet may offer clinical benefits to obese persons with insulin resistance. However, the increase in LDL cholesterol with the LC diet suggests that this measure should be monitored.
In figure two of that study, the plasma beta hydroxybutyrate was not that elevated compared to the LF diet, and declined during the study. There was macronutrient differences between the diets.
It is possible that different mental effects may take place at high levels of beta hydroxybutyrate. I'm not aware of any studies that have looked at people in the "sweet spot" of 1.5-3.
Clinically, I would be keen to use LC diets on people that are insulin resistant, as this study also says. Christopher Gardner published a recent subgroup analysis of the A to Z study showing that those with higher levels of insulin resistance adhered less well to a low fat diet.
The A to Z study was also showed slightly favourable findings for the LCHF diet, though people lost weight, including a lot of weight, on all the diets,.
Diabetes Obes Metab. 2012 Jul 25.
Abstract
Previous research shows diminished weight loss success in insulin-resistant (IR) women assigned to a low-fat (LF) diet compared to those assigned to a low-carbohydrate (LC) diet. These secondary analyses examined the relationship between insulin-resistance status and dietary adherence to either a LF-diet or LC-diet among 81 free-living, overweight/obese women [age = 41.9 ± 5.7 years; body mass index (BMI) = 32.6 ± 3.6 kg/m(2) ]. This study found differential adherence by insulin-resistance status only to a LF-diet, not a LC-diet. IR participants were less likely to adhere and lose weight on a LF-diet compared to insulin-sensitive (IS) participants assigned to the same diet. There were no significant differences between IR and IS participants assigned to LC-diet in relative adherence or weight loss. These results suggest that insulin resistance status may affect dietary adherence to weight loss diets, resulting in higher recidivism and diminished weight loss success of IR participants advised to follow LF-diets for weight loss.
Finally, the other finding from that study was that adherence was very important for weight loss, though I suppose weight maintenance is another problem.
CONCLUSIONS:
Regardless of assigned diet groups, 12-month weight change was greater in the most adherent compared to the least adherent tertiles. These results suggest that strategies to increase adherence may deserve more emphasis than the specific macronutrient composition of the weight loss diet itself in supporting successful weight loss.
Int J Obes (Lond). 2008 Jun;32(6):985-91
I would say I am living proof that one can exercise with virtually no carbs.
And for those who may not remember, I am a 59.5 year-old female with a major family history of "diabetes." To do a century ride in and of itself without tiring (I felt fabulous at the end and could have ridden farther) seems miraculous and to do it without carbohydrates is simply mind-boggling.
You have to eat more fat.About 3,5 times as much as your protein intake. When you eat enought fat you sleep as a log
I'll try that. Thanks.
Thanks for posting this, it's a wealth of resources.
One of Jeff Volek's previous books, which is aimed at people doing weight-training, uses an approach that's basically low carb, with some post workout carbs and re-feeding at the weekend. So I guess that would be what he was doing at the time. It was called the TNT Diet:
http://www.amazon.com/Mens-Health-TNT-Diet-Explosive/dp/1594869766/