Table 2 The maximal displacements in X, Y, Z axis of C7, L1, and knee markers in performing in straight planes and trunk circumduction (normalized by body segments C7-S2, L1-S2, and knee-S2, respectively)

1.12 (0.334)

0.06 (0.018)

1.79 (0.193)

0.44 (0.231)

0.50 (0.389)

1.77 (0.432)

0.07 (0.061)

0.09 (0056)

0.23 (0.075)

0.09 (0.050)

1.50 (0.406)

1.53 (0.115)

0.28 (0.151)

1.46 (0.448)

1.73 (0.223)

0.03 (0.010)

0.20 (0.066)

0.23 (0.109)

0.26 (0.097)

1.13 (0.307)

1.35 (0.154)

0.63 (0.334)

0.85 (0.335)

1.05 (0.346)

0.02 (0.012)

0.30 (0.171)

0.17 (0.037)