An ability to perform daily activities without becoming overtired. Fitness is dependent on strength, flexibility and endurance, and the level of an individual's fitness will often depend upon their type of employment and the extent to which they indulge in physical exercise, whether training in the local health club or at home or regularly participating in sport. Regular fitness improves one's health and well-being. Fitness exercises should be matched to a person's age and abilities, and there is a health danger if someone regularly exercises beyond their capabilities.