Table 1. Demographic data. All values are mean ± standard deviation. Neutral (n =10) Flatfoot (n = 8) High-arch (n = 9) Age (years) 21.6 ± 0.8 21.3 ± 1.5 21.6 ± 2.1 Body height (m) 1.74 ± 0.07 1.68 ± 0.06 1.71 ± 0.03 Body weight (kg) 65.0 ± 13.3 62.9 ± 7.9 63.7 ± 6.4 Foot length (cm) 25.6 ± 1.3 25.3 ± 1.8 25.3 ± 1.1 Foot width (cm) 10.0 ± 0.5 9.8 ± 0.5 10.0 ± 0.3 Foot Posture Index (FPI-6) 2.7 ± 1.6 7.2 ± 1.3* -3.0 ± 1.6†  * Significant differences compared with neutral and high-arch groups on post-hoc Tukey honestly significant difference tests (p < 0.05). †  Significant differences compared with neutral and flatfoot groups on post-hoc Tukey honestly significant difference tests (p < 0.05).