Article

External knee adduction moment has been studied as a surrogate for medial knee
contact force. However, it is not known whether adduction moment is a rational
measure for predicting medial knee contact force. The aim of this study was to
investigate the correlation between knee adduction moment and medial knee contact
force in older people, using musculo-skeletal simulation analysis. One hundred
and twenty-two healthy older subjects participated in this study. Knee moment and
medial knee contact force were calculated based on inverse dynamics analysis of
normal walking. Muscle force and joint reaction force were used to determine the
medial knee contact force during stance phase. The results showed that the
maximum medial knee contact force was moderately correlated to the maximum knee
adduction (r = 0.59) as well as the maximum extension moment (r = 0.60). The
first peak of medial knee contact force had a significant strong correlation with
the first peak of adduction moment and a moderate correlation with the maximum
flexion moment. The second peak of medial knee contact force had a significant
moderate correlation with both the second peak of adduction and the maximum
extension moment. These results implied that the maximum adduction moment value
could be used, to some extent, as a measure of the maximum medial knee contact
force.
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Langue : ANGLAIS