Effect of Whole-Body Vibration Training on Muscle Activation for Individuals with Knee Osteoarthritis

Table 2

Main effects of frequency (or angle) on the EMG%_MVC of VM under different angles (or different frequencies).

Parameters		95% CI			Partial
0°	0 Hz	2.3-4.5	8.914	0.03	0.172
	5 Hz	2.2-4.3
	10 Hz	3.3-6.2
	20 Hz	6.5-18.1
30°	0 Hz	17.3-25.9	8.151	0.02	0.159
	5 Hz	20.7-28.4
	10 Hz	22.6-32.1
	20 Hz	25.5-40.7
60°	0 Hz	33.0-45.8	1.322	0.272	0.03
	5 Hz	33.9-46.9
	10 Hz	33.4-46.9
	20 Hz	33.0-45.8
0 Hz	0°	2.3-4.5	106.861	<0.001	0.713
	30°	17.3-25.9
	60°	33.0-45.8
5 Hz	0°	2.2-4.3	120.733	<0.001	0.737
	30°	20.7-28.4
	60°	33.9-46.9
10 Hz	0°	3.3-6.2	98.255	<0.001	0.696
	30°	22.6-32.1
	60°	33.4-46.9
20 Hz	0°	6.5-18.1	56.058	<0.001	0.566
	30°	25.5-40.7
	60°	33.0-45.8

Abbreviations: EMG%_MVC: muscle activation rate; VM: vastus medialis; CI: confidence interval.