Traditional direction of epidemiology, focused mainly on studying most frequently occurring diseases, is a subject for continuous changes. Complexity of the health evaluation problems brings about the development of new branches of this science. In pediatrics evaluation of the health status is most frequently based on positive and negative health measurements. The aim of this study was the evaluation of trend of changes in blood pressure values in connection with certain morphological features (height & weight). The population studied were children and adolescents age 10-18 from Poznan's cross-sectional blood pressure studies performed in 1986 & 1996. In these studies decrease of blood pressure values and simultaneous deceleration of anthropological features were observed. Presented direction of change of morphological and physiological features shows the need for updating developmental norms in children and adolescents.