Table 2. Comparison of the TA^a thickness between before and after intervention (mm).

		Before	After 4 weeks	After 8 weeks
Exercise group (n= 9)	Resting state	2.5 ± 1.3	2.5 ± 1.0	2.7 ± 1.2
	Maximal contraction of TA	3.9 ± 1.7	3.7 ± 1.3	4.7 ± 1.8
	Maximal contraction of PFM b	3.5 ± 1.7	3.6 ± 1.3	4.5 ± 1.4
	Maximal co-contraction c	3.9 ± 1.0	4.1 ± 1.3	5.4 ± 1.4*
Control group (n= 6)	Resting state	2.2 ± 0.7	2.3 ± 0.4	2.4 ± 0.7
	Maximal contraction of TA	3.6 ± 1.1	3.6 ± 1.0	4.2 ± 0.7
	Maximal contraction of PFM b	3.4 ± 1.5	3.7 ± 0.8	3.6 ± 0.8
	Maximal co-contraction c	4.1 ± 1.3	4.1 ± 0.8	3.8 ± 0.7

Values are means ± SD. *p<0.05 (before and after 8 weeks). ^a TA: transverse abdominal muscle, ^b PFM: pelvic floor muscle, ^c Maximal co-contraction: maximal co-contraction of both the TA and PFM