Fig. 4From: A data process of human knee joint kinematics obtained by motion-capture measurementSquat movement measurement scene. Note: The picture shows a subject in our experiment, and the Optotrak Certus (NDI, Canada) motion capture system was used. The markers in black and white, such as the a–d markers of the calf, are used for other measurements of motion (RSA and HSSA) at the same time in this experimentBack to article page