Table 4.

Validity results comparing IMU to motion capture for trunk ROM and peak rotational velocity.

	ICC(A,1)		RMSE		% Error
Condition	ROM	ωp	ROM	ωp	ROM	ωp
Standing L/R	0.986	0.960	0.59	2.31	−6.0	−6.9
Standing U/D	0.580	0.815	1.82	5.41	−29.3	−11.7
Standing VOR L/R	0.985	0.997	3.55	4.16	1.9	0.6
Standing VOR U/D	0.907	0.787	6.49	12.71	19.2	5.3
Walking L/R	0.997	0.976	1.17	5.47	0.8	−6.3
Walking U/D	0.843	0.746	2.60	12.08	−13.2	−17.1
Tandem walking L/R	0.998	0.976	0.96	3.69	−1.5	−3.5
Tandem walking U/D	0.639	0.436	2.66	13.14	−2.9	0.2
Mean across conditions	0.867	0.837	2.48	7.37	−3.9	−4.9
SD across conditions	0.169	0.189	1.78	4.20	13.8	7.2