Physical fitness means the body is healthy, flexible, strong, and doesn’t get tired easily. Fitness affects the entire body – heart, lungs, bones, muscles – each body function works together.
Before the industrial revolution, fitness was defined as the capacity to carry out the day’s activities without undue fatigue. However, with automation and changes in lifestyles physical fitness is now considered a measure of the body’s ability to function efficiently and effectively in work and leisure activities, to be healthy, to resist hypokinetic diseases, and to meet emergency situations.