Effect of sagittal-plane foot center of pressure manipulation on hip joint biomechanics during gait

Abstract

s / Osteoarthritis and Cartilage 20 (2012) S54–S296 S109 ĂFigure 1: COP manipulation was accomplished using a platform in the form of a shoe in which 2 adjustable convex-shaped biomechanical elements are attached to the feet by means of a shoe sole specially designed with 2mounting rails. One element is located under the hindfoot and the other under the forefoot, enabling continuous positioning of each element in multiple planes. Results: Peak external flexion moment and the associated flexion angle at the time of peak moment increased 16% (p1⁄40.093) and 6% (p1⁄40.017) from A-COP to P-COP, respectively. Peak external extension moment and the associated extension angle at the time of peak moment increased 10% (p1⁄40.047) and 4% (p1⁄40.035) from A-COP to P-COP, respectively. Flexion impulse increased 51% (p1⁄40.047) from A-COP to P-COP. Range of motion (ROM) increased 6% (p1⁄40.011) from A-COP to P-COP (Table 1).