I cannot possibly put enough emphasis on this simple fact—the next 30 days will change your life. It will change the way you think about food. It will change your tastes. It will change your habits and your cravings. It will restore a healthy emotional relationship with food, and with your body. It has the potential to change the way you eat for the rest of your life. I know this because I did it, and millions of people have done it since, and it changed my life (and their lives) in a dramatic and permanent fashion.
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.

Evolutionary biologist Marlene Zuk writes that the idea that our genetic makeup today matches that of our ancestors is misconceived, and that in debate Cordain was "taken aback" when told that 10,000 years was "plenty of time" for an evolutionary change in human digestive abilities to have taken place.[4]:114 On this basis Zuk dismisses Cordain's claim that the paleo diet is "the one and only diet that fits our genetic makeup".[4]
In the long term, you have to be sure you’re getting calcium and other nutrients you’re missing by not having dairy products and certain grains. Some paleo-approved foods, such as salmon and spinach, contain calcium, so you have to be sure you’re including them in your diet. It would be a good idea to check with a registered dietitian, too, to make sure you’re meeting your calcium and other nutrient needs.

Overall, my biggest Whole30 lesson is that mindful eating is possible. I don't have that urge to eat everything in sight, but I also know I don't need to deprive myself or worry about food 24/7. There's a happy medium where I get to decide what I really crave, weigh whether it's worth the bloat or restless sleep I might experience after eating it, and then say yes or no. I've caught myself thinking like this more, and so the ultimate goal of Whole30 has worked: I've changed my relationship with food—for the better.
This 2003 CrossFit Journal article captures an early conception of a universal, multi-event test of fitness that laid the foundation for CrossFit competition, including what would become the CrossFit Open and the CrossFit Games. The design requirements for such a test "included but were not limited to the following: quantifiable results; consistency with the CrossFit fitness concept; raising our commitment to improving absolute strength, relative strength, and gymnastic foundations; balancing intrinsic abilities of smaller and larger athletes; emphasizing exercises critical to and foundational to advanced training; mixing training demands within each test and, of course, over the total competition; a design that would identify an athlete’s weaknesses and possibly stand as a workout plan for improving overall fitness; and, finally, we wanted to design a competition that would be 'hard as hell.'"
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