Abstract
Knee osteoarthritis (OA) is a highly prevalent joint disease among middle-aged and elderly people...
Highlights
Knee osteoarthritis (OA) is a highly prevalent joint disease among middle-aged and elderly people [1,2]
Mechanical stress to the knee joint relates to this prevalence [3,4], and the knee adduction moment (KAM) during gait is a surrogate value of the medial compression force [5,6]
A previous biomechanical gait study showed that restricting the ankle dorsiflexion (DF) angle to ~8° during the terminal stance increases the KAM and the knee extension angle in healthy adults [14], and suggested that improving and/or maintaining the ankle DF angle could prevent medial knee OA
Summary
Knee osteoarthritis (OA) is a highly prevalent joint disease among middle-aged and elderly people [1,2]. Some studies report that women have greater knee joint laxity (hyperextension) compared with men, potential sex differences in the biomechanical effects due to a restricted ankle DF were not investigated. 1) a high prevalence of medial knee OA [1], 2) age-related decreases in the ankle DF angle [18] and. The present study investigated whether the correlation between restricted ankle DF and knee joint biomechanics during the gait differs between the sexes, focusing on the KAM. We hypothesized that a reduced ankle DF would correlate with an increase in the KAM and a decreased knee flexion angle (increased knee extension) during the terminal stance phase, which usually requires ankle DF, to a greater extent in women than in men
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