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Figure 3. (a) Force measuring station for defining stiffness of brace, (b) individual example demonstrating relation between reaction force of brace leading to deformation according to equation in main text, and (c) demonstration of measurement principle. Fbr = force on brace, P = proximal force application point, SDM = spring dynamometer. • Schmalz T, Knopf E, Drewitz H, Blumentritt S. Analysis of biomechanical effectiveness of valgus-inducing knee brace for osteoarthritis of knee. J Rehabil Res Dev. 2010;47(5)419-30.DOI:10.1682/JRRD.2009.05.0067