Crossfit begins with the belief in fitness. The aim of Crossfit is to forge a broad, general and inclusive fitness. We have sought to create a program that would best prepare trainees for any physical contingency-prepare them not only for the unknown but for the unknowable. Looking at all sport and physical tasks collectively, we asked what physical skills and adaptations would most universally lend themselves to performance advantage. Capacity culled from the intersection of all sports demands would quite logically lend itself well to all sport. In sum, our specialty is not specializing. Crossfit is an evidence-based fitness program. We believe that meaningful statements about safety, efficacy and efficiency, the three most important and interdependent facets of any fitness program, can