The digestive abilities of anatomically modern humans, however, are different from those of Paleolithic humans, which undermines the diet's core premise. During the 2.6 million year-long Paleolithic era, the highly variable climate and worldwide spread of human populations meant that humans were, by necessity, nutritionally adaptable. Supporters of the diet mistakenly presuppose that human digestion has remained essentially unchanged over time.
The top male and female from every country with a CrossFit affiliate will receive an invitation to the Games. Can you imagine how difficult it is to win the Open if you’re in a country like USA, Canada, U.K., or Australia? Don’t expect to see many of the big names competing seriously in the Open. They may participate to keep things interesting (and in order to be seeded well for the Games), but I don’t think any of them are doing it expecting to win and have that be their meal ticket.
The New Evolution Diet: What Our Paleolithic Ancestors Can Teach Us about Weight Loss, Fitness, and Aging by Arthur De Vany. Art is the grandfather of the "Paleo Lifestyle" movement. The plan is built on three principles: (1) eat three meals a day made up of nonstarchy vegetables, fruits, and lean proteins; (2) skip meals occasionally to promote a low fasting blood insulin level; and (3) exercise less, not more, in shorter, high-intensity bursts. Note that the book is anti-fat. All oils are to be avoided, though canola is considered okay for higher temperatures. Egg yolks are to be skipped now and then. Published December 21, 2010.
^ Hou JK, Lee D, Lewis J (October 2014). "Diet and inflammatory bowel disease: review of patient-targeted recommendations". Clinical Gastroenterology and Hepatology (Review). 12 (10): 1592–600. doi:10.1016/j.cgh.2013.09.063. PMC 4021001. PMID 24107394. Even less evidence exists for the efficacy of the SCD, FODMAP, or Paleo diets. Furthermore, the practicality of maintaining these interventions over long periods of time is doubtful.
Grass-fed beef is often highlighted on the diet, which is promoted to contain more omega-3 fats than conventional beef (due to being fed grass instead of grain). It does contain small amounts of alpha-linolenic acid (ALA), a precursor to EPA and DHA. However, only a small proportion of ALA can be converted in the body to long-chain omega-3 fatty acids (EPA and DHA). The amount of omega-3 is also highly variable depending on the exact feeding regimen and differences in fat metabolism among cattle breeds.  In general, the amount of omega-3 in grass-fed beef is much lower than that in oily marine fish.  Cooked salmon contains 1000-2000 mg of EPA/DHA per 3-ounce portion, whereas 3 ounces of grass-fed beef contains about 20-200 mg of ALA.
Eat generous amounts of saturated fats like coconut oil and butter or clarified butter. Beef tallow, lard and duck fat are also good, but only if they come from healthy and well-treated animals. Beef or lamb tallow is a better choice than lamb or duck fat. Olive, avocado and macadamia oil are also good fats to use in salads and to drizzle over food, but not for cooking. For more information, have a look at our beginner’s guide to Paleo and fat.
The theory is our bodies were designed, and still optimized, to eat what our Paleolithic ancestors ate. Like your hunger-gatherer forefathers, on Paleo you get all the meat from wild animals and unlimited fruits and vegetables you can eat. But no starchy vegetables (like potatoes), no legumes (like lentils or beans), no wheat, and no grains (like quinoa or corn) because those plants were invented by human beings during the agricultural revolution after our Paleolithic ancestors left the planet. You get one cheat day where you can eat whatever you want (“Occasional cheating and digressions may be just what you need to help you stick to the diet.”) No oil because it puts omega 6 and omega 3 ratios out of whack which should never exceed 2:1, except olive oil if you must. Dairy is also prohibited. And meat must come from animals that weren’t fed grains (like corn) because grains lead to inflammation and increased fat.
Eat Like a Dinosaur: Recipe & Guidebook for Gluten-free Kids by Paleo Parents. The Book is a colorful children's story describing the paleo diet, chock-full of recipes without grains, dairy, soy or refined sugar. For those with food allergies, the top 8 allergens have been visually marked on each recipe for children to self-identify recipes that may contain eggs, nuts, fish, or shellfish. Published March 20, 2012.
Some CrossFitters drink WAYYY too much “kool-aid.” You’ll run into CrossFit people who think CrossFit is the be-all, end-all training solution, and anybody that doesn’t do CrossFit is a wuss. If you can do 20 pull ups, they can do 22, and do them faster than you, after doing 25 handstand push ups and running 400 meters. I tend to dislike elitists no matter what they are elitist about, and CrossFit is no exception.
Like the Paleo Diet, the Keto Diet is low in carbs. But the primary goal of the Keto Diet is to put your body into a state of ketosis, which is when your body uses fat instead of carbohydrates as its primary energy source. When your body enters ketosis, fat travels to the liver and makes an acid called ketones, which enter your bloodstream and are converted into energy.
Since there will be so many individuals (almost 400) at The Games, expect the first handful of events to be a “culling of the herd”. From what I’m gathering, we can expect to see about 75 - 90% of the field eliminated in the first half of The Games events. The remaining Games events would be more of what we’re used to: 40 men & 40 women competing for a chance at the title.
For example, although white potatoes were recorded as being available during the Paleolithic era, they are usually avoided on the Paleo diet because of their high glycemic index. Processed foods are also technically off limits due to an emphasis on fresh foods, but some Paleo diets allow frozen fruits and vegetables because the freezing process preserves most nutrients.
“Overall competitor seeding at the Games will be determined by athletes' scores in the 2019 worldwide CrossFit Open. Athletes who do not participate in the Open (and thus do not receive an Open score) will receive the lowest seeding and will compete in the first qualifying heats at the 2019 Games. Higher seeded athletes will compete in later heats. Any athlete who qualifies for the Games as a national champion or with a top-twenty placement in the 2019 Open can improve their seeding and possibly qualify for a bye out of the first qualifying elimination round by winning a sanctioned event, regardless of whether that sanctioned event occurs before or after the Open in the 2019 competitive season.”
We also talked about our meals, our struggles, and the results we were seeing from Whole30. Mentally, I felt more clear-headed and emotionally stable. I slept deeper and remembered more of my dreams, something that tends to never happen. (In one dream, I accidentally ate a slice of pizza and cried about it because if you break your Whole30 diet, you're supposed to start again from Day 1.)
In Defense of Food: An Eater's Manifesto by Michael Pollan gives a guided tour of 20th century food science, a history of "nutritionism" in America and a look at the marriage of government and the food industry. Then the book presents a commonsense shopping-and-eating guide, which like the paleo diet focuses on shopping the perimeter of the supermarket. He also now has a much shorter Food Rules: An Eater's Manual.
Some specific foods that fall under this rule include: pancakes, waffles, bread, tortillas, biscuits, muffins, cupcakes, cookies, brownies, pizza crust, alternative flour pastas, cereal, or ice cream. No commercially-prepared chips (potato, tortilla, plantain, etc.) or French fries either. However, this list is not limited strictly to these items—there may be other foods that you find are not psychologically healthy for your Whole30. Use your best judgment with those foods that aren’t on this list, but that you suspect are not helping you change your habits or break those cravings. Our mantra: When in doubt, leave it out. It’s only 30 days.
CrossFit, Inc. does not dispute that its methodology has the potential to cause rhabdomyolysis. The company states that exertional rhabdomyolysis can be found in a wide variety of sports and training populations and argues that its critics have conflated CrossFit's high awareness of rhabdomyolysis with high risk. One CrossFit spokesman stated that "ESPN's report on the 53 deaths in US triathlons from 2007 to 2013 should have put the issue to rest."