Table 4.

Percentage of Maximal Voluntary Isometric Contraction (MVIC) at 50% Amplitude Probability Distribution Function (APDF) for the six muscles.

	Brace		No Brace		Between-Condition Cohen’s d
	Mean ± SE	95% CI	Mean ± SE	95% CI
%MVIC at 50% APDF
Left erector spinae	10.98 ± 1.15	10.57, 11.39	11.52 ± 1.48	10.99, 12.05	0.07
Right erector spinae	12.17 ± 1.82	11.52, 12.82	12.18 ± 2.08	11.44, 12.92	0.02
Left upper trapezius	1.68 ± 0.17	1.62, 1.74	1.71 ± 0.21	1.63, 1.79	0.02
Right upper trapezius	2.19 ± 0.36	2.06, 2.32	2.17 ± 0.33	2.05, 2.29	0.01
Left lower trapezius	3.74 ± 0.54 *	3.55, 3.93	4.25 ± 0.57 *	4.05, 4.45	0.07
Right lower trapezius	4.15 ± 0.49 *	3.97, 4.33	4.81 ± 0.59 *	4.60, 5.02	0.06

* Significant between-group difference (p < 0.05); CI = confidence interval; SE = standard error.