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Research into the effectiveness of low-carbohydrate, high fat (LCHF) diets for preventing weight gain and diabetes has produced conflicting results, with some suggestion that diet suitability is not generalizable, but specific to individuals. Overall, for prevention, there is no good evidence that LCHF diets offer a superior diet choice to a more conventional healthy diet, as recommended by many health authorities, in which carbohydrate typically accounts for more than 40% of calories consumed.
The low-carb theory of diet is based on the relationship between blood glucose levels and the hormone insulin, and insulin's role in regulating fat storage in the human body. When one eats a meal high in carbohydrate content, blood sugar rises. In response the pancreas produces insulin. Insulin not only helps cells metabolize glucose but it also regulates the storage of fat in cells, particularly fat tissue. When insulin levels are high, fat storage is high. When insulin levels are low, stored fat is released and little new fat storage occurs. When there is no insulin (Type 1 Diabetes) there is no fat storage.
Fresh fruits and vegetables naturally contain between five and 10 times more potassium than sodium, and Stone Age bodies were well-adapted to this ratio. Potassium is necessary for the heart, kidneys, and other organs to work properly. Low potassium is associated with high blood pressure, heart disease, and stroke — the same problems linked to excessive dietary sodium. Today, the average American consumes about twice as much sodium as potassium! Following a Paleolithic diet helps to remedy this imbalance.
Carbohydrate-restricted diets are no more effective than a conventional healthy diet in preventing the onset of type 2 diabetes, but for people with type 2 diabetes they are a viable option for losing weight or helping with glycemic control. Carbohydrate-restricted dieting does not appear to be helpful in managing type 1 diabetes. The American Diabetes Association recommend that people with diabetes should adopt a generally healthy diet, rather than a diet focused on carbohydrate or other macronutrients.
I am also so amazed at how close he gets to the games before finalizing the workouts. Some, he changes when he gets to Madison and it seems like there is just a general understanding that this is the way it must be. Testing, testing, and testing some more. These thoughts consume him and you get a first-hand look at what he goes through to "get it right."
There is little argument over the health benefits of fruits and vegetables. They are chock-full of vitamins, minerals, fiber and antioxidants. The only caveat for paleo dieters is that some vegetables are starchy (e.g., potatoes) and some fruits are higher in sugar (e.g., bananas). So, if you are trying to lose weight or watch your blood sugar levels, eat these in moderation. In fact, potatoes are banned from some versions of the diet.
The paleo diet (also nicknamed the caveman diet, primal diet, Stone Age diet, and hunter-gatherer diet) is hugely popular these days, and goes by one simple question: What would a caveman eat? Here, we explain what the paleo diet involves, its pros and cons, and, ultimately, what a modern person needs to know to decide whether or not to take the paleo diet plunge.
A crucial difference between different kinds of carbohydrates is how rapidly they're broken down and absorbed into the blood stream, and how "sharp" a spike in blood sugar one experiences after eating them. The glycemic index is one (popular) attempt to quantify this. The glycemic index of a particular foodstuff is calculated by making test subjects eat an amount of the foodstuff that contains 50 grams of total carbohydrate; the subjects' blood glucose is then measured at regular intervals over the next two hours, and the glycemic index is derived from the size of the response curve. Unfortunately, the glycemic index isn't scaled for a reasonable portion size; measuring the G.I. of carrots, for example, requires the test subject to eat a pound and a half of carrots. A more sane quantity, called the glycemic load, is scaled for portion size, but glycemic load data are much more difficult to come by than glycemic index data.
In making the case for meat, Cordain presents anecdotal evidence of Eskimos who lived their full life without a heart attack. The Eskimo diet consists of 97% meat, which he concedes causes all Eskimos to develop atherosclerosis—a common precursor to heart disease. But Cordain says Eskimos never die of heart disease. He discusses one Eskimo who lived 45 years and another who lived 53 years, both without heart disease! He then jumps to the conclusion that because these Eskimos didn’t get heart attacks, even with severe atherosclerosis, meat must have protected them from heart disease. So Cordain’s best case for lots of meat is that you can live to the ripe age of 45 or even 53 without a heart attack. But do people—even unhealthy smokers or the obese—generally get heart attacks before age 53?
^ Another publication of similar regimen was Hill LW, Eckman RS (1915). The Starvation Treatment of Diabetes with a series of graduated diets as used at the Massachusetts General Hospital. Boston: W.M. Leonard. This was so well received that it went into revised editions, eventually becomingThe Allen (Starvation) Treatment of Diabetes with a series of graduated diets (4th ed.). Boston. 1921. p. 140.
NeanderThin: Eat Like a Caveman to Achieve a Lean, Strong, Healthy Body (Hardcover) by Ray Audette, with Troy Gilchrist, was one of the early paleo diet authors. His home page NeanderThin [now restored from archive.org] has a diet based on the ideas of paleolithic nutrition. The diet can be followed as a low-carb, moderate or high carb diet, depending upon whether and how much fruit is used. You can read up through page 19 of the book at Google Books. The original press release from 1999. [The webmaster has an extra copy with the author's signature for sale. It has the original lime-purple cover. Pristine new condition. $60 (shipping included). Paypal only. Use e-mail link at page bottom.]
The Paleolithic or “Paleo” diet seeks to address 21st century ills by revisiting the way humans ate during the Paleolithic era more than 2 million years ago. Paleo proponents state that because our genetics and anatomy have changed very little since the Stone Age, we should eat foods available during that time to promote good health. Our predecessors used simple stone tools that were not advanced enough to grow and cultivate plants, so they hunted, fished, and gathered wild plants for food. If they lived long enough, they were believed to experience less modern-day diseases like diabetes, cancer, and heart disease because of a consistent diet of lean meats and plant foods along with a high level of physical activity from intensive hunting. However, the life expectancy of our predecessors was only a fraction of that of people today.
Primal Body-Primal Mind: Beyond the Paleo Diet for Total Health and a Longer Life by Nora Gedgaudas advocates a diet that our paleo ancestors ate. Meat, lots of fat, and seasonal fruits and berries when available. Basically, sugar and starchy carbs are discouraged. You can download a chapter from the author's site. She has a Primal Body, Primal Mind Radio weekly show on Voice of America. It started May 20, 2009, so there are many shows you can listen to. Published June 30, 2011.
The Raw Paleo Diet & Lifestyle site is a resource created by members of the Raw Paleolithic Diet community for people looking to improve their health by choosing a more historically natural approach to diet, fitness and lifestyle. They have two forums: Raw Paleo Forum. It has some activity. And Raw Paleo Diet, or RVAF Raw Veg and Animal Foods Group, a forum for followers of semi-RPD diets, (such as Aajonus Vonderplanitz's Primal Diet/Weston-Price Diet/Sally Fallon/Instincto) and followers of the NeanderThin/Paleo/Stefansson Diets, who, for health reasons, wish to pursue a more fully Raw, Paleolithic variation of those diets.
Your only job during the Whole30 is to focus on making good food choices. You don’t need to weigh or measure, you don’t need to count calories, you don’t need to purchase everything organic, grass-fed, pastured, or local. Just figure out how to stick to the Whole30 rules in any setting, around every special circumstance, under any amount of stress… for 30 straight days. Your only job? Eat. Good. Food.
The ADA say low-carbohydrate diets can be useful to help people with type 2 diabetes lose weight, but that these diets were poorly defined, difficult to sustain, unsuitable for certain groups of people and that, for diet composition in general, "no single approach has been proven to be consistently superior". Overall, the ADA recommend people with diabetes should be "developing healthy eating patterns rather than focusing on individual macronutrients, micronutrients, or single foods". They recommended that the carbohydrate in a diet should come from "vegetables, legumes, fruits, dairy (milk and yogurt), and whole grains"; highly-refined foods and sugary drinks should be avoided.
But critics argue that the unlimited amount of red meat the paleo diet allows may have an adverse effect on heart health in people with diabetes, as research links eating red meat in excess to poor heart health. (11) If you have diabetes and don’t moderate your red-meat intake, this could be a big problem, as people with diabetes are 2 times as likely to die of heart disease as people who do not have diabetes. (12)