Gear Shifting of Quadriceps during Isometric Knee Extension Disclosed Using Ultrasonography

Figure 8

(a) Overlapped plot of muscle contraction and relaxation stages, (b) torque signal, and (c) coordinates of femur centroids.

(a) Overlapped plot of femora movement in both muscle contraction and relaxation stages

(b) Torque signal

(c) coordinates of femur centroids