To the outside world, though, as Glassman's company has exploded from a cult fitness website to a gym concept primed to have more locations than Curves by the end of 2013, CrossFit can appear risky, unhinged: Here is a fitness routine that has sent people to the hospital, overseen by people who may have had no more than two days of instruction. (Although every real trainer I met had considerable experience and was genuinely excellent, I attended the seminar and passed the test on my fourth day reporting this story. I am, believe me, no fitness savant.) And it's all led by a man who, in a 2006 CrossFit.com comment, wrote, "We have a therapy for injuries at CrossFit called STFU." As in, Shut the f-k up. That's enough to make even the most devoted laissez faire-ists get a little, well, Uncle Pukie.
The main benefit of Whole30 though is to see how certain food groups affect your body. If you normally eat everything, you'll never really know if dairy may be making you bloated or if grains may be upsetting your stomach. By cutting out most of the food groups and processed foods for 30 days and slowly reintroducing them into your diet, you'll be able to spot which foods are doing what to your body. 
Paleo Pals: Jimmy and the Carrot Rocket Ship by Sarah Fragoso. Piper, Phoenix and Parker are not ordinary children–they are super heroes that travel the land helping other children learn about living the healthiest, most exciting, most super lives possible. They are known as The Paleo Pals, and this is a story about how they help out Jimmy, a little boy who is not sure if eating paleo food is even one tiny bit exciting or super. Published February 7, 2012.
Alcohol is a no-no if you are strict paleo. Beer is made from grains, and liquor also contains traces of gluten. But, good news for cider-lovers: most hard ciders are gluten-free, so they are allowed. Check the label to be sure. Red wine is more accepted in the paleo community because it contains the antioxidant resveratrol, but sorry chardonnay lovers, white wine is technically not allowed.
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.]

CrossFit is a strength and conditioning program consisting mainly of a mix of aerobic exercise, calisthenics (body weight exercises), and Olympic weightlifting.[19] CrossFit, Inc. describes its strength and conditioning program as "constantly varied functional movements executed at high intensity across broad time and modal domains,"[20] with the stated goal of improving fitness, which it defines as "work capacity across broad time and modal domains."[21] Hour-long classes at affiliated gyms, or "boxes", typically include a warm-up, a skill development segment, the high-intensity "workout of the day" (or WOD), and a period of individual or group stretching. Some gyms also often have a strength-focused movement prior to the WOD. Performance on each WOD is often scored and/or ranked to encourage competition and to track individual progress. Some affiliates offer additional classes, such as Olympic weightlifting, which are not centered around a WOD.[22]
The night before, he had rolled up with his entourage about 20 minutes late to a packed lecture hall of 500 CrossFitters at the University of Washington campus. He had been invited to speak there by the Freedom Foundation, a local libertarian group. Libertarians love CrossFit. It's neither a wholly owned chain of gyms nor a franchise, but the nucleus of a sprawling worldwide network of entrepreneurs. A local CrossFit gym is referred to as a box, because it can be anywhere and any style, and the culture of any box may be nothing like that of Glassman's company, or of any other CrossFit box. Boxes may even have different business models. And yet, there in the audience was the order spawned from the chaos: rows and rows of passionate CrossFitters, united in their love of the WOD, their muscled physiques rippling beneath T-shirts and hoodies.

A number of randomized clinical trials have compared the paleo diet to other eating plans, such as the Mediterranean Diet or the Diabetes Diet. Overall, these trials suggest that a paleo diet may provide some benefits when compared with diets of fruits, vegetables, lean meats, whole grains, legumes and low-fat dairy products. These benefits may include:


However, placing certain food groups on your "do not eat" list does have the potential work against you. "When a person sees the foods as 'off limits,' and consuming them is somehow breaking a rule and therefore sees themselves as a 'bad person,' mental damage is what is going to ensue long term versus the 30-day health benefits that you will receive," Smith cautions.

"CrossFit is not a specialized fitness program, but a deliberate attempt to optimize physical competence in each of 10 recognized fitness domains," says founder Greg Glassman in the Foundations document. Those domains are cardiovascular and respiratory endurance, stamina, strength, flexibility, power, speed, coordination, agility, balance, and accuracy.[33]
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