Article

The purpose of this study was to examine the effects of gait speed and unilateral
lower limb loading on step time and step length symmetry in healthy adults.
Spatiotemporal gait data were collected from 22 healthy subjects (11 men, 11
women), using the GaitRite walkway, under four randomly sequenced test
conditions: self-selected speed (SS), fast speed (F), self-selected speed with
the right leg loaded (LSS), and the fastest attainable speed with the right leg
loaded (LF). The symmetry index, calculated with the formula [((R-L)/0.5 x (R+L))
x 100], was used to quantify step time and step length symmetry. It was found
that over-ground gait speed had no significant effects on the symmetry of step
time or step length. Unilateral lower limb loading significantly increased step
time asymmetry, with longer step time for the loaded leg. Step symmetry was
further compromised and became more asymmetrical when, in addition to unilateral
leg loading, subjects maximized their gait speed. This effect of fast speed with
unilateral leg loading was particularly prominent in relation to step length,
with its shortening in the unloaded leg and lengthening in the loaded leg. These
observations in healthy subjects may serve as a reference for the assessment of
gait symmetry in patients with unilateral lower limb pathologies.
CI - Copyright (c) 2011 Elsevier B.V. All rights reserved.

Langue : ANGLAIS