This document discusses the importance of fitness and its benefits. It defines physical fitness as the body's ability to work efficiently and carry out daily activities while having enough energy to handle emergencies. Physical fitness has many health benefits and includes both health-related and skill-related components. Health-related components are cardiovascular endurance, strength, flexibility, and body composition, while skill-related components include agility, balance, power, reaction time, and speed. Maintaining a lifetime of physical activity and fitness requires regular self-assessment and planning.