An A-to-Z, top-to-bottom guide to getting in shape and achieving a high level of conditioning and endurance: includes 1) a concise but thorough foundation of the physiology of training; 2) general concepts for putting together effective training programs and workout formats, with many examples; descriptions of a wide range of exercises grouped by modalities, like medicine balls, sandbags, and agility work; and 4) myriad sample workouts and routines.