Effect of Core Stability Training Monitored by Rehabilitative Ultrasound Image and Surface Electromyogram in Local Core Muscles of Healthy People

Table 3

Comparison of the muscle thickness activation ratio of MF between the monitoring group and control group in 0, 4, and 8 weeks (mean ± SD).

		Monitoring group	Control group	Between-group value
Left	Baseline	1.23 ± 0.04	1.25 ± 0.03	0.328
	4 weeks	1.33 ± 0.04	1.30 ± 0.04	0.013
	8 weeks	1.41 ± 0.05	1.37 ± 0.05	≤0.001
Intragroup value (baseline vs 8 weeks)		≤0.001	≤0.001
Mauchly’s sphericity test W = 0.986 ()
Right	Baseline	1.25 ± 0.05	1.23 ± 0.05	0.117
	4 weeks	1.33 ± 0.05	1.32 ± 0.04	0.645
	8 weeks	1.41 ± 0.05	1.37 ± 0.05	0.002
Intragroup value (baseline vs 8 weeks)		≤0.001	≤0.001
Mauchly’s sphericity test W = 0.930 ()

Activation ratio = contraction thickness/relax thickness. Compared with baseline, .