Article

The purpose of this study is to
simulate and evaluate the effects of deformation height when calculating the COP
in a deformable surface during gait. The GRF and COP data during normal gait were
collected from 20 healthy adult males on sand in two conditions (level and
cross-slope of 10 degrees ). The COP differences in the anteroposterior (AP) and
mediolateral (ML) directions were modeled for constant deformation heights (10-50
mm, 10 mm increments). The results showed the magnitude of COP changes in the AP
and ML directions were different in both level and cross-slope conditions. A
significantly larger COPML difference was shown for the cross-slope condition
than level condition for the same deformation height.
The COP was more sensitive
to the deformation height for the downhill limb than uphill limb in the
cross-slope condition. The results of this study suggest that the maximum
allowable deformation height before a correction for surface deformation is
needed is 20mm for level condition and 10mm for cross-slope condition, where 3mm
difference in COP is considered as the tolerance limit. Surface deformations
beyond these thresholds may lead to an inaccurate interpretation and evaluation
of joint kinetics during gait on deformable surfaces.
CI - Copyright (c) 2015 Elsevier B.V. All rights reserved.

Langue : ANGLAIS