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Title: Capacity to Increase Walking Speed is Limited by impaired hip and ankle power generation in lower functioning persons post-stroke
Authors: Jonkers, Ilse ×
Delp, S
Patten, C #
Issue Date: Jan-2009
Publisher: Butterworth-Heinemann
Series Title: Gait & Posture vol:29 issue:1 pages:129-137
Abstract: It is well known that stroke patients walk with reduced speed, but their potential to increase walking
speed can also be impaired and has not been thoroughly investigated. We hypothesized that failure to
effectively recruit both hip flexor and ankle plantarflexor muscles of the paretic side limits the potential
to increase walking speed in lower functioning hemiparetic subjects. To test this hypothesis, we
measured gait kinematics and kinetics of 12 persons with hemiparesis following stroke at self-selected
and fast walking conditions. Two groups were identified: (1) lower functioning subjects (n = 6) who
increased normalized walking speed from 0.52 leg lengths/s (ll/s, SEM: 0.04) to 0.72 ll/s (SEM: 0.03) and
(2) higher functioning subjects (n = 6) who increased walking speed from 0.88 ll/s (SEM: 0.04) to 1.4 ll/s
(SEM 0.03). Changes in spatiotemporal parameters, joint kinematics and kinetics between self-selected
and fast walking were compared to control subjects examined atmatched walking speeds (0.35 ll/s (SEM:
0.03), 0.63 ll/s (SEM: 0.03), 0.92 ll/s (SEM: 0.04) and 1.4 ll/s (SEM: 0.04)). Similar to speed-matched
controls, the higher functioning hemiparetic subjects increased paretic limb hip flexion power and ankle
plantarflexion power to increase walking speed. The lower functioning hemiparetic subjects did not
increase power generation at the hip or ankle to increase walking speed. This observation suggests that
impaired ankle power generation combined with saturation of hip power generation limits the potential
to increase walking speed in lower functioning hemiparetic subjects
ISSN: 0966-6362
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Movement Control & Neuroplasticity Research Group
× corresponding author
# (joint) last author

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