Article

The purpose of this study was to investigate the characteristics of
biomechanical and clinical measurements in relation to the knee adduction moment
when wearing a standard shoe and a shoe design for individuals with knee
osteoarthritis (Flex-OA). METHODS: Kinematic and kinetic data were collected from
thirty-two healthy individuals (64 knees) using a ten camera motion analysis
system and four force plates. Subjects performed 5 walking trials under the two
conditions and the magnitude of individuals' biomechanical responses where
explored in relation to the clinical assessment of the Foot Posture Index, hip
rotation range, strength of hip rotators, and active ankle-foot motion, all of
which have been described as possible compensation mechanisms in knee
osteoarthritis. RESULTS: Significant reductions in the first peak of the knee
adduction moment (KAM) during stance phase (9.3%) were recorded (p<0.0001).
However, despite this difference, 22 of 64 knees showed either no change or an
increased KAM, indicating a non-response or negative-response to the Flex-OA
shoe. Significant differences were observed between the responder and
non-responder subgroups in the hip rotation range ratio (p=0.044) and the hip
rotators strength ratio (p=0.028). CONCLUSION: Significant differences were seen
in clinical assessments of hip rotation range and hip rotator strength between
responders and non-responders using a cut-off of 0.02Nm/kg change in the KAM.
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Langue : ANGLAIS