Influência da altura do salto sobre os percentuais do peso corporal aplicados na base de sustentação durante a postura ereta / Influence of heel height on the percentage of body weight applied to the base of support during stance

ABSTRACT

The main purpose of this research was to verify the influence of the heel height of different styles of shoes upon the percentual of the body weight (BW) applied to both forepart and backpart of the feet on standing up. This is a descriptive study - comparative, whereas II ladies, spontaneously available, bearing the same age, body mass and height of heels have been analysed, such as (1) -0.9 cm (negative heel); (2) 0.7 cm (no heel); (3) 5 cm, (4) 5.6 cm, (5) 7.5 cm and (6) 9 cm (the last ones positive heel) and the condition of barefooted has been adopted as reference. The percentuals of the body weight applied to the backpart and forepart of the feet, have been quantified through the vertical component (Fy) of the ground reaction force (GRF) from kinetic analysis done with two force plataforms AMTI. For statistical treatment, it was adopted the test ANOVA One way, post hoc de Tukey, the statistical package SPSS (p<0.05). Accordingly to the results obtained, one can observe that the transference of the transference of the BW from the backpart of the foot into the forepart of the foot, was not proportional to the heel heigth of the shoes. In two out of the six heel heigths (5.6 cm and 9 cm) only on the rigth foot there were significant statistical differences. On the left foot, only in one single heel heigth (5.6 cm) it was observed a transference of the percentual of the BW from the backpart of the upholding sipport, considering the ladies who had been evaluated, the four styles of shoes with different heights of heels (-0.9 cm, 0.7 cm, 5 cm and 7.5 cm) can be adapted to either styles, keeping the average percentual Fy, applied to the forepart and the backpart of the foot, on standing up, when compared to a barefooted condition...