The document discusses physical fitness, exercise, physical activity, and eating habits. It defines physical fitness as having good health and the ability to engage in physical activities without getting tired. Physical fitness has two components - health fitness which is the body's ability to fight diseases, and body fitness which is the ability to do physical activities without tiring. The document also outlines the different components of health-related fitness and skills-related fitness. It defines physical activity, exercise, different types of exercises, and barriers to physical activity participation. Finally, it discusses eating habits and defines it as why, how, what, and with whom people eat.