Table 7.

Nonparametric Friedman’s tests and percent differences regarding the effect of method (inertial measurement unit [IMU] or optical motion capture [OMC]) on root mean squares of lumbosacral (L5/S1) and thoracolumbar (T12/L1) joint moments across conditions.

Joint	FE		LB		AR
	% diff	P	% diff	P	% diff	P
L5/S1	42.2	0.009	42.7	< 0.001	13.2	0.001
T12/L1	29.9	0.046	− 25.6	0.001	23.1	0.162

% diff calculated as ((IMU–OMC)/OMC)*100. $\alpha =0.05$. FE, flexion–extension; LB, lateral bending; AR,  axial rotation.