Article

Biomechanical analysis of lower extremity activities while walking at different
speeds and in challenging conditions may help to identify specific gait patterns
associated with knee osteoarthritis (knee-OA). We hypothesized that individuals
with asymptomatic knee-OA have lower ankle activity, while individuals with
symptomatic knee-OA have similar or higher ankle activity compared to individuals
without knee-OA, and that such differences are enhanced during challenging gait
tasks. We tested this hypothesis by examining gait characteristics in multiple
gait tasks using data from 153 Baltimore Longitudinal Study of Aging (BLSA)
participants (112 without knee-OA, 41 with knee-OA; 53-87 years, 52% women). All
participants who could walk unassisted were evaluated in the BLSA gait lab while
walking at self-selected speed (usual-walking), at maximum speed (fast-walking)
and again at self-selected speed after 30-min of walking activities
(usual-walking-after-30 min). Knee range of motion was lower for knee-OA
participants in the fast-walking and usual-walking-after-30 min tasks (p<0.030).
Ankle range of motion for symptomatic knee-OA was greater compared to
asymptomatic knee-OA for all walking tasks (p<0.050). Symptomatic knee-OA had
greater generative MWE of the ankle compared to asymptomatic knee-OA (p=0.034),
while keeping similar absorptive MWE of the knee when compared to no-OA controls
(p=0.151). Symptomatic knee-OA individuals seem to adapt an ankle kinematic gait
pattern aimed at avoiding knee pain, by enhancing forward propulsion so to
minimize knee joint load. Whether these conditions represent subsequent steps in
the causal pathway from knee-OA to changes in gait is still not clear.
CI - Published by Elsevier B.V.

Langue : ANGLAIS