This one was hard for us to grasp, so it deserves some explanation. If a Paleo pancake calls for nothing but Whole30-approved ingredients (eggs and bananas), the flapjack is still off-limits. The Whole30 wants you to change your habits and your emotional relationship with food. "Your brain doesn't know the difference between an almond flour brownie and your mom's recipe; it just knows you crave sugar. So if you keep eating those sweets during the 30 days, your habits aren't changing," Hartwig says. Don't shoot the messenger!

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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