That being said, I wasn't surprised to see Whole30 on the naughty list last year. In case you're not familiar with the program, you cut out all processed foods, grains, legumes, soy and dairy (that includes sugar and alcohol) for 30 days. You're left with meats, seafood, fruits, vegetables, nut butters and nut milks (as long as there's no added sugar — read your labels).
A strict paleo diet does not allow dairy products because hunter-gatherers did not milk cows. Some paleo dieters say dairy is OK, especially if it is grass-fed because grass-fed butter, for example, has more omega-3s. Fermented dairy products are also OK for some paleo eaters because they have a lower content of lactose and casein, the two concerns paleo dieters have with dairy.
Ever start a diet and get immediately discouraged when the number on your scale hasn't budged after a week or two? Whole30 forbids weighing yourself — a practice which can help shift your mindset to how you're feeling as your success metric. "The scale shouldn’t drive your mood, food choices or overall mindset," says Amy Shapiro, RD. "Continue to live a healthy life and measure how you feel energy and clarity wise." Which means being honest with yourself about how your body feels after going to town on that cheese plate. One of the biggest realizations for me was how much clearer and more energetic I feel when my weekend diet doesn't consist of vodka-sodas and takeout food.
The data for Cordain's book only came from six contemporary hunter-gatherer groups, mainly living in marginal habitats. One of the studies was on the !Kung, whose diet was recorded for a single month, and one was on the Inuit. Due to these limitations, the book has been criticized as painting an incomplete picture of the diets of Paleolithic humans. It has been noted that the rationale for the diet does not adequately account for the fact that, due to the pressures of artificial selection, most modern domesticated plants and animals differ drastically from their Paleolithic ancestors; likewise, their nutritional profiles are very different from their ancient counterparts. For example, wild almonds produce potentially fatal levels of cyanide, but this trait has been bred out of domesticated varieties using artificial selection. Many vegetables, such as broccoli, did not exist in the Paleolithic period; broccoli, cabbage, cauliflower, and kale are modern cultivars of the ancient species Brassica oleracea.
CrossFit gyms use equipment from multiple disciplines, including barbells, dumbbells, gymnastics rings, pull-up bars, jump ropes, kettlebells, medicine balls, plyo boxes, resistance bands, rowing machines, and various mats. CrossFit is focused on "constantly varied, high-intensity, functional movement," drawing on categories and exercises such as calisthenics, Olympic-style weightlifting, powerlifting, Strongman-type events, plyometrics, body weight exercises, indoor rowing, aerobic exercise, running, and swimming.