. 2015 Jun 30;27(6):1997–1999. doi: 10.1589/jpts.27.1997

Table 1. Activities of the trunk core muscles with respect to sling height and hip joint abduction and adduction.

Muscle	Motion	Low	High
Transversus abdominis	Adduction*	16.2 ± 3.3^†	48.2 ± 14.1^†
Transversus abdominis	Abduction**	10.9 ± 1.5	21.3 ± 3.4
Rectus abdominis	Adduction*	6.3 ± 1.0^†	12.4 ± 3.4
Rectus abdominis	Abduction*	3.9 ± 0.4	8.0 ± 1.7
Erector spinae	Adduction*	77.0 ± 9.5^††	86.3 ± 10.5^††
Erector spinae	Abduction*	50.6 ± 10.0	56.6 ± 9.1

Data are percentages of the maximum voluntary isometric contraction (mean ± SD). *^,**p < 0.05, p < 0.01 within low and high sling position, respectively. ^{†, ††} p < 0.05, p < 0.01 within adduction and abduction, respectively.