The foundation of the CrossFit’s hierarchy of development is Nutrition. Proper nutrition builds a solid molecular foundation. You cannot make up for poor nutrition with exercise.
“CrossFit’s nutrition prescription: Eat meat and vegetables, nuts and seeds, some fruits, little starch, and no sugar. Keep intake to levels that will support exercise but not body fat… Nutrition can be a touchy topic, like politics or religion, that people take very personally, but good nutrition is the foundation not only for general health but also for high-performance fitness.” – Coach Greg Glassman