Table 3. Outcome measure data of trunk muscle activity (N=20)

Variables	Indirect PFMs exercise using a PBU
		Before exercise	Immediately after exercise	After 10 min of exercise	p
TrA/IO	Left	15.12±4.56	24.51±4.77†	22.80±4.22‡	<0.01*
	Right	14.13±5.00	24.29±4.80†	23.42±4.64‡	<0.01*
MF	Left	7.46±1.32	13.09±3.13†	12.20±2.40‡	<0.01*
	Right	8.57±1.76	13.19±2.33†	12.32±2.52‡	<0.01*
EO	Left	13.81±2.94	19.80±3.64†	16.86±6.58	<0.01*
	Right	16.59±4.63	23.26±3.40†	19.02±3.59§	<0.01*
RA	Left	8.39±2.74	11.18±3.50†	8.91±3.38§	<0.01*
	Right	8.51±2.21	11.17±4.66†	9.54±3.32	0.02

Values are mean±SD; EO, external abdominal oblique; IO, internal abdominal oblique; MF, multifidus; PBU, pressure biofeedback unit; PFMs, pelvic floor muscles; RA, rectus abdominis; SD, standard deviation; TrA, transverse abdominis;
p<0.05.
Significant difference between before exercise and immediately after exercise.
Significant difference between before exercise and after 10 min of exercise.
Significant difference between immediately after exercise and after 10 min of exercise.