Impact of Different Body Positions on Bioelectrical Activity of the Pelvic Floor Muscles in Nulliparous Continent Women

Table 4

Normalized amplitude (%MVC) for rectus abdominis, transversus abdominis, and gluteus maximus in lying, sitting, and standing positions during a sustained 60-second voluntary pelvic floor muscles contraction.

		Muscles
Position		Pelvic floor muscle		Rectus abdominis		Transversus abdominis		Gluteus maximus
		Mean (%)	SD	Mean (%)	SD	Mean (%)	SD	Mean (%)	SD
Mean amplitude (%MVC)
Lying	19	60.87	14.25	3.88	2.1	43.88	20.97	6.25	3.8
Sitting	19	63.5	18.55	4.07	3.02	31.43	17.44	8.62	5.9
Standing	19	62.23	21.65	4.73	3.18	44.02	21.2	7.84	4.05
(lying/standing/sitting)
(lying/sitting)		0.0011		0.041		0.000022		0.000021
(lying/standing)		0.2		0.000022		0.98		0.000025
(standing/sitting)		0.26		0.000022		0.000022		0.049

: Friedman’s ANOVA.
: Tukey’s post hoc test.