Figure 2.

Medial, lateral, and total contact forces over the gait cycle for the two trials selected for each competition. Experimental forces were measured with a force-measuring knee replacement (black solid line) and predicted by the 2010 [5], 2011 [6], and 2012 [7, 8] winners of the competition. In 2010 and 2011, competitors were asked to submit only blinded predictions (dark grey dashed line). In 2012, competitors were asked to submit blinded (dark grey dashed line) and unblinded (light grey solid line) predictions, and the judges selected two co-winners (2012a and 2012b).