TABLE 5.

The differences in the root mean square of the targeted eight muscles of the dominant side during voluntary lateral weight shifting (median [25th percentile, 75th percentile], unit: %MVC).

Root mean square	Low back pain group (n = 14)	Control group (n = 14)	p	Effect size (r)	Power (1-β)
Gastrocnemius	2.70 [1.32, 3.61]	2.95 [0.82, 5.28]	0.818	−0.043	0.820
Tibialis Anterior	1.30 [0.74, 3.19]	2.76 [0.66, 4.94]	0.435	−0.148	0.485
Peroneus Longus	2.76 [1.51, 3.70]	3.51 [2.33, 5.41]	0.232	−0.226	0.347
Biceps Femoris	0.90 [0.63, 1.89]	1.90 [1.45, 4.53]	0.043 a	−0.382	0.207
Rectus Femoris	0.54 [0.34, 0.92]	0.44 [0.19, 1.85]	0.854	−0.035	0.855
Gluteus Maximus	1.42 [0.80, 3.05]	1.64 [0.50, 4.47]	0.818	−0.043	0.820
Gluteus Medius	3.32 [1.66, 6.26]	3.44 [1.75, 5.67]	0.963	−0.009	0.963
Erector Spinae	4.43 [1.94, 7.20]	5.52 [3.80, 7.40]	0.383	−0.165	0.447

^a Significant difference between groups at 0.05 level.