Body posture in the sagittal plane and the mean loading point among girls and boys aged 12 to 15 years

The aim of the research was to analyze the relationship between body postures in the sagittal plane and mean loading point X (MLPX) and mean loading point Y (MLPY) among children aged 12 to 15 years. 503 children from the Primary School number 13 and the Gymnasium number 4 in Starachowice took part in the research. The spatial photogrammetric method which uses the effect of projection chamber was used in the research. Balance was examined on the stabiligraphic platform. MLPX value for the whole group fluctuated from -0.86 (mm) with OE to -2.49 (mm) with CE. The difference in the Romberg test was 1.63(mm). In the correct posture type SPOX value fluctuated from -0.90 (mm) with OE to -2.13 (mm) with CE. The difference in Romberg test was 1.23 (mm). In the faulty posture type MLPX value fluctuated from -0.81 (mm) with OE to -3.02 (mm) with CE. The difference in Romberg test was 2.21 (mm). MLPY value for the whole group fluctuated from 39.72 with OE to 40.16 with CE. The difference in Romberg test was -0.44 (mm). In the correct posture type MLPY value fluctuated from 39.37 (mm) with OE to 39.20 (mm) with CE. The difference in Romberg test was 0.18 (mm). In the faulty posture type MLPY value fluctuated from 40.22 (mm) with OE to 41.56 (mm) with CE. The difference in Romberg test was -1.34 (mm). The analysis of variance showed a significant effect of the examined options (p < 0.001). Closing eyes results in an increase of MLPX value in correct as well as faulty body postures. Children with faulty posture have higher MLPX values. Although the MLPY value was slightly higher in faulty postures, the variation analysis did not show any significant effects.