Article

Osteoarthritis is a common musculo-skeletal problem accompanied with
muscle weakness. Muscle weakness may be readily improved by resistance training.
Greater muscle strength has been associated with a lower knee joint loading rate.
METHODS: We conducted a single-blind randomized controlled trial of 54 female
patients with osteoarthritis in at least one knee, according to the American College of Rheumatology clinical criteria. Patients were randomized into a
6-month high intensity progressive resistance training or a sham-exercise
program. The primary outcomes were first peak knee and hip adduction moment
measured using three-dimensional gait analysis at self-selected habitual and
maximal speeds. Secondary outcomes were sagittal plane knee and hip moments, peak
muscle strength, gait speed, and self-reported knee osteoarthritis symptoms
measured by the Western Ontario and McMaster Osteoarthritis Index (WOMAC).
FINDINGS: Six months of high intensity resistance training did not change the
first peak knee or hip adduction moment at either habitual or maximum walking
speeds (P>0.413) compared to the sham-exercise.
However, the second peak hip
adduction moment (P=0.025) and WOMAC pain score (P<0.001) were reduced
significantly in both groups over time, but there was no group effect. The changes in the second peak hip adduction moment were inversely related to the
changes in the WOMAC pain score (r=-0.394, P=0.009). INTERPRETATIONS: Muscle
strength training in women with osteoarthritis, while effective for reducing
osteoarthritis symptoms, appeared to operate through mechanisms other than
improved knee or hip joint loading, as paradoxically, improved symptoms were
related to decreases of hip adduction moment in late stance.
CI - Crown Copyright (c) 2010. Published by Elsevier Ltd. All rights reserved.

Langue : ANGLAIS