Validity of Measurement for Trailing Limb Angle and Propulsion Force during Gait Using a Magnetic Inertial Measurement Unit

Table 4

Relationship between acceleration of trunk (thorax, lumbar spine) obtained by magnetic inertial measurement unit and acceleration of the center of mass calculated from anterior ground reaction force (AGRF) (mean ± SD).

	Thorax		Lumbar		AGRF
	Acceleration (m/s^2)		Acceleration (m/s^2)		Acceleration (m/s^2)
Preferred	1.97 ± 0.56	0.484 (0.042)	3.12 ± 0.67	0.590 (0.010)	2.14 ± 0.38
Slow	1.72 ± 0.66	0.445 (0.064)	2.49 ± 0.65	0.680 (0.002)	1.66 ± 0.37
Fast	2.51 ± 0.89	0.770 (<0.001)	3.57 ± 1.01	0.699 (0.001)	2.53 ± 0.48
Lean-preferred	1.72 ± 0.47	0.525 (0.025)	2.48 ± 0.48	0.541 (0.020)	1.70 ± 0.37
Lean-slow	1.49 ± 0.42	0.684 (0.002)	2.05 ± 0.51	0.828 (<0.001)	1.38 ± 0.44