Table 2.

Muscle activation measured in the no-vibration/vibration condition (RMS, Mean ± SD)

	Frequency (HZ)	Single bridge (μV)	Plank (μV)	Side stay (μV)	V crunch (μV)
Multifidus muscle	0	67.45 ± 6.15	13.15 ± 4.67	13.64 ± 3.23	23.72 ± 4.06
	5	70.56 ± 5.61	24.53 ± 4.75	22.14 ± 3.16	48.51 ± 6.25
	10	93.45 ± 6.39	32.02 ± 3.22	27.13 ± 4.08	52.16 ± 5.22
	15	84.47 ± 4.28	45.02 ± 5.43	34.37 ± 4.85	56.72 ± 4.01
Erector spinae muscle	0	67.28 ± 5.91	11.65 ± 3.22	13.13 ± 3.59	35.60 ± 9.70
	5	70.87 ± 5.82	17.18 ± 2.18	18.65 ± 2.63	64.73 ± 6.12
	10	74.39 ± 8.52	27.51 ± 3.90	22.66 ± 2.48	71.23 ± 2.23
	15	80.21 ± 3.24	33.65 ± 2.98	25.50 ± 1.68	92.56 ± 5.36
Rectus abdominis muscle	0	11.26 ± 1.86	88.62 ± 7.50	23.02 ± 4.72	89.47 ± 8.03
	5	20.09 ± 2.63	98.23 ± 5.23	28.34 ± 4.10	163.93 ± 7.02
	10	27.43 ± 3.57	135.91 ± 3.60	36.93 ± 3.69	191.24 ± 8.10
	15	35.13 ± 3.73	171.52 ± 4.25	43.96 ± 4.32	231.4 ± 10.37
Obliques externus muscle	0	16.63 ± 2.97	39.27 ± 3.92	21.41 ± 5.68	42.95 ± 4.95
	5	25.58 ± 1.55	56.7 ± 5.15	28.35 ± 4.22	73.98 ± 6.25
	10	41.02 ± 3.30	66.98 ± 2.89	40.15 ± 2.02	112.92 ± 3.65
	15	47.56 ± 4.94	72.12 ± 5.48	49.74 ± 4.03	101.64 ± 10.08