Fig. 3
From: Effect of heel height on patellofemoral joint stress during stair descent

Four different heel heights of shoes used in this study. From left to right: flat (1 cm), low (3 cm), medium (5 cm), and high (7 cm).
From: Effect of heel height on patellofemoral joint stress during stair descent
Four different heel heights of shoes used in this study. From left to right: flat (1 cm), low (3 cm), medium (5 cm), and high (7 cm).