Fig. 1.
Illustrations of the segmental angles for the geometric model. Eight segments and 16 degrees of freedom are used for the analysis; 8 degrees of freedom in the frontal plane (Θ1: left shank, Θ2: left thigh, Θ3: pelvis, Θ4: right thigh, Θ5: right shank, Θ6: lower trunk, Θ7: upper trunk, Θ8: head) and 8 degrees of freedom in sagittal and transverse plane (α1: left shank, α2: left thigh, α3: pelvis, α4: right thigh, α5: right shank, α6: lower trunk, α7: upper trunk, α8: head). The segments were defined from marker data (black circle) as follows: shank; ankle to knee joint, thigh; knee to hip joint, pelvis; left hip to right hip joint, lower trunk; middle point of both hip joints to T10, upper trunk; T10 to C7, neck; C7 to middle point of foreheads