Physical fitness refers to an individual's capacity to perform daily tasks with vigor and alertness, supported by components such as cardio-respiratory endurance, body composition, muscular strength, muscular endurance, and flexibility. Health-related fitness encompasses the ability of the body systems to work efficiently, while skills-related fitness includes factors like speed, power, coordination, balance, agility, and reaction time. Various tests, including the BMI calculation, flexibility tests, and strength assessments, are used to evaluate these fitness components.