Figure 2.

Linear regression of isometric knee extensor peak torque and rectus femoris (RF) muscle thickness (A) and vastus lateralis (VL) muscle thickness (B) in both participants with cerebral palsy (CP) (gold squares) and participants with typical development (blue squares). All relationships were statistically significant, except for the relationship between RF muscle thickness and knee extensor torque in the CP group. In the regression equations, ISOM=isometric knee extensor peak torque (N·m), RFMT=RF muscle thickness (millimeters), and VLMT=VL muscle thickness (millimeters).