This is excerpt eight in the “What is Fitness” series from the CrossFit Journal article “What is Fitness”


Nutrition plays a critical role in your fitness. Proper nutrition can amplify or diminish the effect of your training efforts. Effective nutrition is moderate in protein, carbohydrate and fat. Forget about the fad high-carbohydrate, low-fat and low-protein diet. Balanced macronutrient and healthy nutrition looks more like 40 percent carbohydrate, 30 percent protein and 30 percent fat. Dr. Barry Sears’ Zone Diet still offers the greatest precision, efficacy and health benefit of any clearly defined protocol. The Zone Diet does an adequate job of jointly managing issues of blood glucose control, proper macronutrient proportion and caloric restriction whether your concern is athletic performance, disease prevention and longevity, or body composition. We recommend that everyone read Dr. Sears’ book “Enter the Zone.”


Sport plays a wonderful role in fitness. Sport is the application of fitness in a fantastic atmosphere of competition and mastery. Training efforts typically include relatively predictable repetitive movements and provide limited opportunity for the essential combination of our 10 general physical skills. It is, after all, the combined expression, or application, of the 10 general skills that is our motivation for their development in the first place. Sports and games like soccer, martial arts, baseball and basketball in contrast to our training workouts have more varied and less predictable movements. But where sports develop and require all 10 general skills simultaneously, they do so slowly compared to our strength-and-conditioning regimen. Sport is better, in our view, at expression and testing of skills than it is at developing these same skills. Both expression and development are crucial to our fitness. Sport in many respects more closely mimics the demands of nature than does our training. We encourage and expect our athletes to engage in regular sports efforts in addition to all of their strength-and-conditioning work.