Table 2. Position of surface electromyography electrode attachment

Variable	Position
TrA/IO	Lateral 2 cm of L4, 5 SP
MF	Medial 2 cm and inferior 2 cm of ASIS
EO	Lateral 12–15 cm of navel
RA	Lateral 2 cm of navel

Abbreviations: ASIS, anterior superior iliac spine; EO, external abdominal oblique; IO, internal abdominal oblique; MF, multifidus; RA, rectus abdominis; SP, spinous process; TrA, transverse abdominis.