[Physical fitness for sports in the preschool age].
The preschool years are characterized by the learning of combinations of movements that make it possible for children to attain an astonishingly high level of physical performance. With regard to their metabolism and cardiovascular/cardiopulmonary system, they have at their disposal good prerequisites for aerobic endurance training. However, it is a matter of the natural movements involved in playing rather than striving to reach a high level of performance. Sports during the preschool age advances physical development and serves as a form of early prevention of the diseases of civilization.