Regular postural pose occupies less and less its own place in children's everyday activities. Irregular sittings, standings, inadequate bed and pillow for sleeping, different kinds of motion activities as well as the certain endogenous factors systematically take effect on vertebra column, causing changes which often cross the zone of tolerance of soft spine tissues, not achieving bigger damages, but with cumulative function through repeating and long-lasting positions and tissue movements go through certain deformities regarding their own morphology and function. The subject of this research is establishing the influence of morphological space on postural disorders in sagittal plane of the fifth grade pupils of elementary schools on the territory of the city Kragujevac. The sample amounted to 434. Fundamental morphological characteristics of boys to which the irregular kifotic and lortodic posture is established show that body height and sitting body height are in positive correlation with postural disorders.The boys with more noticeable body height and sitting body height had certain changes of position of spine column in pectoral (thoracic) and back (lumbar) region, perceived in sagittal plane, which we can characterize as postural disorders. After interpretation of coefficients of cross-correlation analysis, we see statistically important connection of variables of longitudinal dimension of skeleton, body weight and thoracic cage size with variable of lordosis (LOR), until we achieve the significant connection between predictoral variables and kifosis (KIF). The obtained results show a significant connection of body height and sitting body height, as well as body weight with deviations of vertebra column in lumbar region, perceptible in sagittal plane. .
