In the centre of my interest is to analyse how different environmental factors (for example different kinds of trainings, daily PE-classes, or even nutritional characteristics) effect body structure, body composition, motor performance and psycho-social condition in different age and activity (top athletes, recreational sportsmen and hypoactive samples) groups. The health-centered, complex assessment of these groups will provide the opportunity to follow up changes of the subjects’s (parameters) indicators as well as to compare them to previous and present references. Furthermore I consider it important to determine preventive aims and tasks through the relationship of the constitution, motor ability, physiological-exercise physiological parameters and socio-economic background, targeting first of all younger schoolchildren decisively at the primary and secondary level of prevention.