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

Table 3

Normalized amplitude (%MVC) for rectus abdominis and transversus abdominis in lying, sitting, and standing positions during 5 repetitions of 10-second voluntary pelvic floor muscles contractions.

		Muscles
Position		Pelvic floor muscle		Rectus abdominis		Transverses abdominis
		Mean (%)	SD	Mean (%)	SD	Mean (%)	SD
Average mean amplitude (%MVC)
Lying	19	80.07	30.7	3.82	1.92	53.45	29.98
Sitting	19	82.19	40.52	5.23	3.47	35.25	19.47
Standing	19	98.28	62.66	7.49	5.07	61.11	38.94
(lying/standing/sitting)
(lying/sitting)		0.98		0.56		0.077
(lying/standing)		0.21		0.031		0.61
(standing/sitting)		0.29		0.23		0.0086
Average peak amplitude (%MVC)
Lying	19	108.83	41.99	5.16	3.15	72.48	39.95
Sitting	19	110.93	60.74	6.97	4.23	45.93	27.58
Standing	19	129.45	89.75	9.96	7.16	80.5	53.48
(lying/standing/sitting)
(lying/sitting)		0.99		0.6		0.058
(lying/standing)		0.29		0.043		0.75
(standing/sitting)		0.37		0.26		0.011

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