The assessment of the relationships between body posture indices and the Y-Balance Test results in the adolescents.

PURPOSE The purpose of this work was to assess the differences of the values of body posture indices, measured with the Moire's method, between girls and boys aged 13 and the relationships of these values with the results of the Y-Balance Test. METHODS The study involved a group of healthy volunteers attending junior high schools in Cracow. The group consisted of 20 girls and 35 boys. Basic somatic parameters were measured within this work: body height and weight. Body posture was assessed according to the general methodology of the Moire's technique and 14 body posture indices were obtained as a result: 6 in the sagittal plane, 1 in the axial plane and 7 in the coronal plane. Postural stability was assessed with the Y-Balance Test (YBT). RESULTS The studied girls and boys had practically the same body posture - statistical differences were found only in 3 out of 14 assessed indices measured with the Moire's technique. Scoliosis was found in as many as 51% of the subjects, however, mean values of deviations from the C7-S1 line were not large. CONCLUSIONS In the group of girls, the set of blades (below - above) was statistically significantly correlated with the global YBT result for the right inferior extremity, and in the group of boys - the set of the waist triangles (below - above) was statistically significantly correlated with the global YBT results for the right and left inferior extremities.