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

Table 1

Normalized amplitude (%MVC) for rectus abdominis and transversus abdominis in lying, sitting, and standing positions during 5 repeated short (quick flick) voluntary pelvic floor muscles contractions.

		Muscles
Position		Pelvic floor muscle		Rectus abdominis		Transversus abdominis
		Mean (%)	SD	Mean (%)	SD	Mean (%)	SD
Average mean amplitude (%MVC)
Lying	19	62.19	33.23	2.52	1.91	37.7	26.07
Sitting	19	53.03	28.73	2.39	1.62	16.82	10.95
Standing	19	46.27	39.3	3.35	2.55	27.51	19.95
(lying/standing/sitting)
(lying/sitting)		0.16		0.99		0.0074
(lying/standing)		0.0064		0.6		0.26
(standing/sitting)		0.35		0.51		0.23
Average peak amplitude (%MVC)
Lying	19	111.35	48.23	4.45	3.23	70.06	48.56
Sitting	19	114.46	69.29	4.69	3.17	38.91	25.81
Standing	19	120.23	99.74	7.13	5.35	65.69	53.14
(lying/standing/sitting)
(lying/sitting)		0.97		0.99		0.018
(lying/standing)		0.81		0.35		0.91
(standing/sitting)		0.91		0.42		0.046

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