TABLE 3.

Surface EMG amplitude of the participants. Electrode positions E1, E2, and E3 are displayed in Figure 2 and data is given as mean with standard deviation (mean ± SD). The most relevant values for the evaluations are printed in bold (activity of the muscle group on which the indentation was conducted).

	Body position	E1	E2	E3
Baseline activity in µV	Supine	6.8 ± 1.04	6.9 ± 2.30	5.0 ± 0.31
	Lateral	8.3 ± 5.09	6.4 ± 1.42	4.8 ± 0.41
	Prone	5.2 ± 0.42	5.0 ± 0.34	6.1 ± 1.73
MVC in µV	Supine	235.4 ± 168.95	61.7 ± 39.46	40.2 ± 35.09
	Lateral	72.7 ± 75.25	133.6 ± 101.62	50.5 ± 31.79
	Prone	16.1 ± 10.19	33.3 ± 18.56	105.2 ± 45.32
	Measurement region
Muscle activity in %	R1	3.9 ± 2.4	14.1 ± 9.3	36.4 ± 30.8
	R2	4.1 ± 2.1	18.9 ± 16.5	36.1 ± 30.2
	R3	3.7 ± 2.3	14.5 ± 11.5	38.8 ± 33.3
	R4	4.0 ± 2.4	24.8 ± 23.8	36.2 ± 30.7
	R5	33.6 ± 41.0	8.3 ± 5.7	14.9 ± 10.5
	R6	42.6 ± 18.4	20.3 ± 10.3	6.6 ± 2.8
	A1	30.2 ± 9.4	40.7 ± 25.2	35.3 ± 32.3
	A2	32.3 ± 6.6	41.8 ± 22.7	34.6 ± 28.6
	A3	37.2 ± 7.4	51.6 ± 29.8	35.4 ± 29.3
	A4	34.4 ± 5.0	51.7 ± 30.8	38.6 ± 37.6
	A5	44.1 ± 39.8	26.8 ± 13.2	42.8 ± 33.3
	A6	61.6 ± 22.6	33.3 ± 17.4	44.9 ± 5.5