Fig. 1

Joint kinematics of A) the pelvis and hip joint in the sagittal, frontal, and transverse plane B) the knee joint in the sagittal and frontal plane, ankle joint in the sagittal plane, and foot progression (the foot relative to the global coordinate system of the laboratory) during level gait at self-selected speed in a group of children with achondroplasia (n = 16) and a control group (n = 19). The solid red line represents the group mean of children with achondroplasia, and the solid grey line represents the group mean of the control group. The corresponding shaded areas represent the mean ± 1 standard deviation of each group, respectively