The document discusses the components of fitness and principles of training. It defines fitness as the ability to carry out daily tasks without undue fatigue and with reserve energy. The components of fitness include health-related components like cardiorespiratory endurance, muscular strength and flexibility, as well as skill-related components like speed, power, agility and coordination. The principles of training that can improve performance are specificity, progressive overload, and applying the FITT principles of frequency, intensity, time and type to a training program.