Article

To clarify the magnitude of shape change during walking, the shapes of four
cross-sections (Forefoot, Instep, Navicular, and Heel) of the right foot during
standing and walking were measured using a four-dimensional measurement system we
developed (14 Hz) with an accuracy of +/-0.5 mm. Images of the sole were measured
using a high-speed video camera (120 Hz). Cross-section shapes and derived
dimensions were compared between the standing condition, first peak (P1), and
midstance valley of two peaks (MSV) of vGRF during walking.
Heel and Navicular
cross-sections were more laterally inclined during walking than during standing
by 6 degrees on average. Compared to at standing, breadth of the cross-section in
contact with the ground was wider at the heel and instep at timing P1, and was
wider at the forefoot and narrower at heel at timing MSV. Medial length was
longer and dorsal arch was higher during walking than during standing. Plantar
arch height did not differ between the three conditions. The maximum difference
in plantar arch height between standing and P1 was 1.3 mm, much smaller than the
inter-individual variation of 7 mm.

Langue : ANGLAIS