Article

Increased impact loading is implicated in knee osteoarthritis
development and progression. This study examined the impact ground
reaction force (GRF) peak, its loading rate, its relative timing to stance phase
timing, and walking speed during unilateral and bilateral use of laterally wedged
insoles with arch supports. STUDY DESIGN: Within-subject design. METHODS:
Thirty-three female patients with medial knee osteoarthritis were examined with
(unilateral 6 degrees and 11 degrees , and bilateral 0 degrees , 6 degrees , and
11 degrees ) and without insole use. RESULTS: Repeated measures MANOVA revealed
that the impact force increased significantly in bilateral 11 degrees versus
unilateral 6 degrees and without-insole conditions. The loading rate decreased
significantly in unilateral 11 degrees versus bilateral 6 degrees insoles. The
relative timing increased significantly in each of bilateral 6 degrees ,
bilateral 11 degrees , and unilateral 11 degrees versus bilateral 0 degrees
insoles and in each of bilateral 11 degrees and unilateral 11 degrees versus
without-insole condition.
There were significant positive correlations between
the walking speed and each of the force and loading rate. The Chi-square test
revealed insignificant association between the insole condition and the presence
of impact forces. CONCLUSION: Unilateral 11 degrees insoles are capable of
reducing impact loading possibly through increasing foot pronation. Walking
slowly is another possible strategy to reduce loading. CLINICAL RELEVANCE:
Unilaterally applied 11 degrees laterally wedged insoles are capable of reducing
and delaying the initial impact ground reaction forces and reducing their loading
rates during walking in patients with medial knee osteoarthritis, thus reducing
osteoarthritis progression. Walking slowly could also be used as a strategy to
reduce impact loading.
CI - (c) The International Society for Prosthetics and Orthotics 2015.

Langue : ANGLAIS