Kinematic Analysis of a Six-Degrees-of-Freedom Model Based on ISB Recommendation: A Repeatability Analysis and Comparison with Conventional Gait Model

Table 1

Average intertrial, intraprotocol variability and mean absolute variability over the gait cycle across four subjects. Corresponding values from Manca et al. [9] and Schwartz et al. [10]. ^*Data estimated from figures provided.

Rotations [°]	Intertrial	Intertrial	Intraprotocol	Intraprotocol	Mean absolute variability (MAV)	Intertrial	Intertrial
	ISB 6DOF	HH	ISB 6DOF	HH	ISB 6DOF compared to HH
	Present study	Present study	Present study	Present study	Present study	Manca et al. [9]	Schwartz [10]
Pelvis tilt	0.6	0.4	3.0	2.7	4.0	0.9	0.8^*
Pelvis obliquity	0.4	0.5	2.8	1.7	3.1	1.4	0.5^*
Pelvis rotation	2.8	1.3	5.8	1.8	4.2	1.7	1.0^*
Hip flex/ext	1.2	1.5	5.4	5.3	12.6	1.8	1.2^*
Hip abd/add	0.7	0.6	5.5	2.6	5.4	1.7	0.5^*
Hip intr/extr	1.2	0.8	8.2	11.5	8.5	2.9	1.2^*
Knee flex/ext	1.8	1.6	9.8	5.0	15.4	2.2	1.6
Knee var/valg	1.8	0.5	8.7	5.9	11.7	1.6	0.5^*
Knee intr/extr	1.6	1.8	16.2	22.2	23.5	4.3	1.2^*
Ankle dor/pla	1.3	—	7.2	—	—	2.0	1.3^*
Ankle inv/ev	1.5	—	6.8	—	—	2.3	—
Ankle abd/add	1.1	1.2	4.0	2.4	10.3	2.8	1.7