Abstract
Purpose: During walking, extensor moments generated at the ankle, knee and hip are responsible for vertically supporting the body and advancing the body center of mass forward. Support moment (SM) is the sum of ankle, knee, and hip extensor moments when the limb accepts full body weight during gait (Figure 1). To maintain adequate SM, lower moment at one joint may be compensated by greater moment at the other. Cross-sectional studies have shown that persons with knee OA, compared to healthy controls, have increased ankle and decreased knee contribution to the total SM during walking.
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