Article

This study compares the pattern and variability of inter-joint coordination
between treadmill and overground walking. Gait analyses of five young adults were
performed during preferred speed overground walking (GPS), preferred speed
treadmill walking (TPS), and treadmill walking with overground preferred speed
(TGS). Continuous relative phase (CRP), derived from the phase portraits of two
adjacent joints, was used to examine the inter-joint coordination.
Cross-correlation measures and root-mean-square (RMS) differences were used to
compare CRP patterns of the GPS condition to those of TPS and TGS conditions
respectively. The deviation phase (DP) was used to evaluate the variability of
inter-joint coordination during the stance and swing phases over a gait cycle for
each condition. The walking speed of TPS was significantly slower than those of
GPS and TGS. For the hip-knee CRP pattern, the RMS differences between GPS and
TPS were significantly greater than the RMS differences between GPS and TGS. No
significant differences between conditions were detected for the
cross-correlation measures of hip-knee and knee-ankle CRP patterns. During the
stance phase, the hip-knee DP values of TGS were significantly smaller than that
of GPS and the knee-ankle DP values of TGS were also significantly smaller than
that of GPS and TPS. No significant differences were detected for all three
conditions in the swing phase. The findings suggest that the treadmill imposes a
systemic regulation on dynamic neuromuscular control during walking, which may
need to be considered while interpreting treadmill-based analysis of training to
overground walking.
CI - Copyright (c) 2014 Elsevier B.V. All rights reserved.

Langue : ANGLAIS